bodeoptions
Plot options for bodeplot
Description
Use the bodeoptions
function to create a
BodeOptions
object to customize Bode plot appearance. Use this object to
customize the appearance of a Bode plot created using bodeplot
and override the plot preferences for the MATLAB® session in which you create the Bode plot.
The options you specify for a BodeOptions
object correspond to properties
of a BodePlot
chart
object.
Creation
Description
returns a default
set of plot options for use with plotoptions
= bodeoptionsbodeplot
. You can use these options
to customize the Bode plot appearance using the command line. This syntax is useful when
you want to write a script to generate plots that look the same regardless of the
preference settings of the MATLAB session in which you run the script.
initializes the plot options with the options you selected in the Control System Toolbox™ and System Identification Toolbox™ preferences editor. For more information about the editor, see Specify Toolbox Preferences for Linear Analysis Plots. This syntax is useful when you
want to change a few plot options but otherwise use your default preferences. A script
that uses this syntax can generate results that look different when run in a session with
different preferences.plotoptions
= bodeoptions("cstprefs")
Properties
Response
MagVisible
— Option to display magnitude plot
'on'
(default) | 'off'
Option to display magnitude plot, specified as either 'on'
or
'off'
.
This option corresponds to the MagnitudeVisible
property of
the chart object.
PhaseVisible
— Option to display phase plot
'on'
(default) | 'off'
Option to display phase plot, specified as either 'on'
or
'off'
.
This option corresponds to the PhaseVisible
property of the
chart object.
MagLowerLimMode
— Lower magnitude limit mode
'auto'
(default) | 'manual'
Lower magnitude limit mode, specified as either 'auto
' or 'manual
'.
This option corresponds to the MinimumGainEnabled
property of the chart object.
MagLowerLim
— Lower magnitude limit value
'-inf
' (default) | scalar
Lower magnitude limit value, specified as a scalar.
This option corresponds to the MinimumGainValue
property of the chart object.
ConfidenceRegionNumberSD
— Number of standard deviations to use to plot the confidence region
1
(default) | scalar
Number of standard deviations to use to plot the confidence region, specified as a scalar. This option is applicable to identified models only.
This option corresponds to the
Characteristics.ConfidenceRegion.NumberOfStandardDeviations
property of the chart object.
Dependencies
This option is supported only for identified models, which require System Identification Toolbox software.
Units and Scaling
FreqUnits
— Frequency units
'rad/s'
(default) | 'Hz'
| 'rpm'
| 'auto'
| ...
Frequency units, specified as one of the following values:
'Hz'
'rad/s'
'rpm'
'kHz'
'MHz'
'GHz'
'rad/nanosecond'
'rad/microsecond'
'rad/millisecond'
'rad/minute'
'rad/hour'
'rad/day'
'rad/week'
'rad/month'
'rad/year'
'cycles/nanosecond'
'cycles/microsecond'
'cycles/millisecond'
'cycles/hour'
'cycles/day'
'cycles/week'
'cycles/month'
'cycles/year'
You can also specify 'auto'
which uses frequency
'rad/TimeUnit'
, where TimeUnit
is the
TimeUnit
property of the input system.
This option corresponds to the FrequencyUnit
property of the chart object.
FreqScale
— Frequency scale
'log'
(default) | 'linear'
Frequency scale, specified as either 'log'
or 'linear'
.
This option corresponds to the FrequencyScale
property of the chart object.
MagUnits
— Magnitude units
'dB'
(default) | 'abs'
Magnitude units, specified as one of the following:
'dB'
— Decibels'abs'
— Absolute value
This option corresponds to the MagnitudeUnit
property of the chart object.
MagScale
— Magnitude scale
'log'
(default) | 'linear'
Magnitude scale, specified as either 'log'
or 'linear'
.
This option corresponds to the MagnitudeScale
property of the
chart object.
PhaseUnits
— Phase units
'deg'
(default) | 'rad'
Phase units, specified as one of the following:
'deg'
— Degrees'rad'
— Radians
This option corresponds to the PhaseUnit
property of the chart object.
Phase Wrapping and Matching
PhaseWrapping
— Enable phase wrapping
'off'
(default) | 'on'
Option to enable phase wrapping, specified as either 'off'
or
'on'
. When phase wrapping is enabled, the phase shown in
the response wraps to remain in the range defined by
PhaseWrappingBranch
.
When both phase wrapping and phase matching are enabled, the software performs the phase matching followed by the phase wrapping.
This option corresponds to the PhaseWrappingEnabled
property of the chart object.
PhaseWrappingBranch
— Lower limit of phase-wrapping range
-180
(default) | scalar
Lower limit of phase-wrapping range, specified as a scalar value in degrees.
The phase-wrapping range is [B,B+360), where
B is equal to
PhaseWrappingBranch
.
This option corresponds to the PhaseWrappingBranch
property of the chart object.
PhaseMatching
— Enable phase matching
'off'
(default) | 'on'
Option to enable phase matching, specified as either 'off'
or
'on'
. When phase matching is enabled, the phase response
matches the value specified in PhaseMatchingValue
at the
frequency specified in PhaseMatchingFreq
. The remaining
phase response shifts to maintain the same phase profile.
This option corresponds to the PhaseMatchingEnabled
property of the chart object.
When both phase wrapping and phase matching are enabled, the software performs the phase matching followed by the phase wrapping.
PhaseMatchingFreq
— Phase matching frequency
0
(default) | scalar
Phase matching frequency, specified as a scalar.
This option corresponds to the PhaseMatchingFrequency
property of the chart object.
PhaseMatchingValue
— Phase matching response value
0
(default) | scalar
Phase matching response value, specified as a scalar.
This option corresponds to the PhaseMatchingValue
property of the chart object.
Inputs and Outputs
IOGrouping
— Grouping of input-output pairs
'none'
(default) | 'inputs'
| 'outputs'
| 'all'
Grouping of input-output (I/O) pairs, specified as one of the following:
'none'
— Do not group inputs or outputs.'inputs'
— Group only inputs.'outputs'
— Group only outputs.'all'
— Group all input-output pairs.
This option corresponds to the IOGrouping
property of the chart object.
InputLabels
— Input label style
structure
Input label style, specified as a structure with the following fields:
FontSize
— Font size, specified as a scalar value greater than zero in point units. The default font size depends on the specific operating system and locale. One point equals1/72
inch.FontWeight
— Character thickness, specified as'Normal'
or'bold'
. MATLAB uses theFontWeight
property to select a font from those available on your system. Not all fonts have a bold weight. Therefore, specifying a bold font weight can still result in the normal font weight.FontAngle
— Character slant, specified as'Normal'
or'italic'
. Not all fonts have both font styles. Therefore, the italic font might look the same as the normal font.Color
— Text color, specified as an RGB triplet. The default color is dark grey with the RGB triplet[0.4,0.4,0.4]
.Interpreter
— Text interpreter, specified as one of these values:'tex'
— Interpret characters using a subset of TeX markup. This is the default value ofInterpreter
.'latex'
— Interpret characters using LaTeX markup.'none'
— Display literal characters.
This option corresponds to the InputLabels
property of
the chart object.
OutputLabels
— Output label style
structure
Output label style, specified as a structure with the following fields:
FontSize
— Font size, specified as a scalar value greater than zero in point units. The default font size depends on the specific operating system and locale. One point equals1/72
inch.FontWeight
— Character thickness, specified as'Normal'
or'bold'
. MATLAB uses theFontWeight
property to select a font from those available on your system. Not all fonts have a bold weight. Therefore, specifying a bold font weight can still result in the normal font weight.FontAngle
— Character slant, specified as'Normal'
or ''italic'
. Not all fonts have both font styles. Therefore, the italic font might look the same as the normal font.Color
— Text color, specified as an RGB triplet. The default color is dark grey with the RGB triplet[0.4,0.4,0.4]
.Interpreter
— Text interpreter, specified as one of these values:'tex'
— Interpret characters using a subset of TeX markup. This is the default value ofInterpreter
.'latex'
— Interpret characters using LaTeX markup.'none'
— Display literal characters.
This option corresponds to the OutputLabels
property of
the chart object.
InputVisible
— Option to display inputs
{'on'}
(default) | {'off'}
| cell array
Option to display inputs, specified as {'on'}
, {'off'}
, or a cell array with multiple elements.
This option corresponds to the InputVisible
property of the chart object.
OutputVisible
— Option to display outputs
{'on'}
(default) | {'off'}
| cell array
Option to display outputs, specified as {'on'}
, {'off'}
, or a cell array with multiple elements.
This option corresponds to the OutputVisible
property of the chart object.
Title and Axis Labels
Title
— Title text and style
structure
Title text and style, specified as a structure with the following fields:
String
— Label text, specified as a character vector. By default, the plot is titled 'Bode Diagram'.FontSize
— Font size, specified as a scalar value greater than zero in point units. The default font size depends on the specific operating system and locale. One point equals1/72
inch.FontWeight
— Character thickness, specified as'Normal'
or'bold'
. MATLAB uses theFontWeight
property to select a font from those available on your system. Not all fonts have a bold weight. Therefore, specifying a bold font weight can still result in the normal font weight.FontAngle
— Character slant, specified as'Normal'
or'italic'
. Not all fonts have both font styles. Therefore, the italic font might look the same as the normal font.Color
— Text color, specified as an RGB triplet. The default color is black specified by the RGB triplet[0,0,0]
.Interpreter
— Text interpreter, specified as one of these values:'tex'
— Interpret characters using a subset of TeX markup. This is the default value ofInterpreter
.'latex'
— Interpret characters using LaTeX markup.'none'
— Display literal characters.
This option corresponds to the Title
property of the chart object.
XLabel
— X-axis label text and style
structure
X-axis label text and style, specified as a structure with the following fields:
String
— Label text, specified as a character vector. By default, the axis is titled based on the frequency unitsFreqUnits
.FontSize
— Font size, specified as a scalar value greater than zero in point units. The default font size depends on the specific operating system and locale. One point equals1/72
inch.FontWeight
— Character thickness, specified as'Normal'
or'bold'
. MATLAB uses theFontWeight
property to select a font from those available on your system. Not all fonts have a bold weight. Therefore, specifying a bold font weight can still result in the normal font weight.FontAngle
— Character slant, specified as'Normal'
or'italic'
. Not all fonts have both font styles. Therefore, the italic font might look the same as the normal font.Color
— Text color, specified as an RGB triplet. The default color is black specified by the RGB triplet[0,0,0]
.Interpreter
— Text interpreter, specified as one of these values:'tex'
— Interpret characters using a subset of TeX markup. This is the default value ofInterpreter
.'latex'
— Interpret characters using LaTeX markup.'none'
— Display literal characters.
This option corresponds to the XLabel
property of the chart object.
YLabel
— Y-axis label text and style
structure
Y-axis label text and style, specified as a structure with the following fields:
String
— Label text, specified as a cell array of character vectors. By default, the axis label is a 1x2 cell array with 'Magnitude' and 'Phase'.FontSize
— Font size, specified as a scalar value greater than zero in point units. The default font size depends on the specific operating system and locale. One point equals1/72
inch.FontWeight
— Character thickness, specified as'Normal'
or'bold'
. MATLAB uses theFontWeight
property to select a font from those available on your system. Not all fonts have a bold weight. Therefore, specifying a bold font weight can still result in the normal font weight.FontAngle
— Character slant, specified as'Normal'
or'italic'
. Not all fonts have both font styles. Therefore, the italic font might look the same as the normal font.Color
— Text color, specified as an RGB triplet. The default color is black specified by the RGB triplet[0,0,0]
.Interpreter
— Text interpreter, specified as one of these values:'tex'
— Interpret characters using a subset of TeX markup. This is the default value ofInterpreter
.'latex'
— Interpret characters using LaTeX markup.'none'
— Display literal characters.
This option corresponds to the YLabel
property of the chart object.
TickLabel
— Tick label style
structure
Tick label style, specified as a structure with the following fields:
FontSize
— Font size, specified as a scalar value greater than zero in point units. The default font size depends on the specific operating system and locale. One point equals1/72
inch.FontWeight
— Character thickness, specified as'Normal'
or'bold'
. MATLAB uses theFontWeight
property to select a font from those available on your system. Not all fonts have a bold weight. Therefore, specifying a bold font weight can still result in the normal font weight.FontAngle
— Character slant, specified as'Normal'
or'italic'
. Not all fonts have both font styles. Therefore, the italic font might look the same as the normal font.Color
— Text color, specified as an RGB triplet. The default color is black specified by the RGB triplet[0,0,0]
.
Grid
Grid
— Toggle grid display
'off'
(default) | 'on'
Toggle grid display on the plot, specified as either 'off
' or 'on
'.
This option corresponds to the GridVisible
property of the chart object.
GridColor
— Color of the grid lines
[0.15 0.15 0.15]
(default) | RGB triplet
Color of the grid lines, specified as an RGB triplet. The default color is light grey specified by the RGB triplet [0.15 0.15 0.15]
.
Axis Limits
XLimMode
— X-axis limit selection mode
'auto'
(default) | 'manual'
| cell array
X-axis limit selection mode, specified as one of the following values:
'auto'
— Enable automatic limit selection, which is based on the total span of the plotted data.'manual'
— Manually specify the axis limits. To specify the axis limits, set theXLim
option.
This option corresponds to the XLimitsMode
property of the chart object.
YLimMode
— Y-axis limit selection mode
'auto'
(default) | 'manual'
| cell array
Selection mode for the y-axis limits, specified as one of these values:
'auto'
— Enable automatic limit selection, which is based on the total span of the plotted data.'manual'
— Manually specify the axis limits. To specify the axis limits, set theYLim
option.
This option corresponds to the YLimitsMode
property of the chart object.
XLim
— X-axis limits
'{[1,10]}'
(default) | cell array of two-element vectors of the form [min,max]
| cell array
X-axis limits, specified as a cell array of two-element vector of the form [min,max]
.
This option corresponds to the XLimits
property of the chart object.
YLim
— Y-axis limits
'{[1,10]}'
(default) | cell array of two-element vector of the form [min,max]
| cell array
Y-axis limits, specified as a cell array of two-element vector of the form [min,max]
.
This option corresponds to the YLimits
property of the chart object.
Object Functions
bodeplot | Plot Bode frequency response of dynamic system |
Examples
Custom Bode Plot Settings Independent of Preferences
For this example, create a Bode plot that uses 15-point red text for the title and sets a custom title. When you specify plot properties explicitly using bodeoptions
, the specified properties override the MATLAB session preferences. Thus, the plot looks the same regardless of the preferences of the MATLAB session in which it is generated.
First, create a default options set using bodeoptions
.
opts = bodeoptions;
Next, change the required properties of the options set opts
. Because opt.Title
is a structure, specify the properties of the plot title by specifying the fields and values of that structure.
opts.Title.FontSize = 15; opts.Title.Color = [1 0 0]; opts.Title.String = 'System Frequency Response'; opts.FreqUnits = 'Hz';
Now, create a Bode plot using the options set opts
.
bodeplot(tf(1,[1,1]),opts);
Because opts
begins with a fixed set of options, the plot result is independent of the toolbox preferences of the MATLAB session.
Version History
Introduced in R2008a
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