setColor
(Not recommended) Set color used to draw ROI object
setColor
is not recommended. With the new ROIs, set the value of
the Color
property instead. For more information, see Version History.
Syntax
Description
Examples
Set Color of Polygon ROI
Display an image. Draw a polygon on the image, specifying the location of five vertices.
imshow("gantrycrane.png")
h = impoly(gca,[188,30; 189,142; 93,141; 13,41; 14,29]);
Set the color of the polygon to yellow.
setColor(h,"yellow");
Input Arguments
color
— ROI color
RGB triplet | color name | short color name
ROI color, specified as an RGB triplet, a color name, or a short color name.
You can specify any color using an RGB triplet. An RGB triplet is a 3-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range [0, 1].
You can specify some common colors by name as a string scalar or character vector. This table lists the named color options and the equivalent RGB triplets.
Color Name | Short Name | RGB Triplet | Appearance |
---|---|---|---|
"red" | "r" | [1 0 0] |
|
"green" | "g" | [0 1 0] |
|
"blue" | "b" | [0 0 1] |
|
"cyan"
| "c" | [0 1 1] |
|
"magenta" | "m" | [1 0 1] |
|
"yellow" | "y" | [1 1 0] |
|
"black" | "k" | [0 0 0] |
|
"white" | "w" | [1 1 1] |
|
Here are the RGB triplets for the default colors that MATLAB® uses in many types of plots.
RGB Triplet | Appearance |
---|---|
[0 0.4470 0.7410] |
|
[0.8500 0.3250 0.0980] |
|
[0.9290 0.6940 0.1250] |
|
[0.4940 0.1840 0.5560] |
|
[0.4660 0.6740 0.1880] |
|
[0.3010 0.7450 0.9330] |
|
[0.6350 0.0780 0.1840] |
|
Example: "r"
Example: "green"
Example: [0 0.4470 0.7410]
Version History
Introduced in R2008aR2018b: setColor
is not recommended
Starting in R2018b, a new set of ROI objects replaces the existing set of ROI objects. The new objects provide more functional capabilities, such as face color transparency. The new classes also support events that you can use to respond to changes in your ROI such as moving or being clicked. Although there are no plans to remove the old ROI objects at this time, switch to the new ROIs to take advantage of the additional capabilities and flexibility. For more information on creating ROIs using the new ROI functions, see Create ROI Shapes.
To set the color of the new ROIs, set the value of the Color
property.
Update all instances of setColor
.
Discouraged Usage | Recommended Replacement |
---|---|
This example creates an ROI and uses
imshow("cameraman.tif"); h = imrect(gca,[10 10 100 100]); setColor(h,"yellow"); | Replace the ROI with the equivalent new ROI object.
Then, delete the call to imshow("cameraman.tif"); h = drawrectangle(gca,"Position",[10 10 100 100]); h.Color = "yellow" |
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