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How to detect the black line from a captured image?
If you print it out and make a photo, then black is not pure black any more but some kind of grayish or with some kind of color ...

4 years ago | 0

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plot Datetime on x Axes
There are mainly 2 possibilities You can use datetick() to format your x axis ticks to date or time values You can define your...

4 years ago | 0

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Run a script for all subfolders
You can use the asterisk (*) as wildcard to generate a file pattern and the dir command to get a struct of all the matching file...

4 years ago | 1

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How to write this matlab code?
In Matlab, you could write something like B = rand(8760, 30); % matrix B of size 8760x30 with random values P = rand(30, 1); %...

4 years ago | 0

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Help!!! How to browse text file data to another function
It seems that you access the value of the button, which is not what you intend to do. What you probably want to do is to share d...

4 years ago | 0

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i want to generate a sequence of n numbers
You can create sequences with the colon operator (:), for exapmle v = [4:2:100]; creates v = [4, 6, 8, ... , 100] with values ...

4 years ago | 1

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Plots combining into one
In line 32 of your code there is a (second) "hold on" which acts on the active axes. If you want to have two figures with one ax...

4 years ago | 0

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Extracting Data from Tall Arrays using Logical Indexing
I think you mentioned everything that you need for this task. Try this as a starting point: clearvars, close all clc % some...

4 years ago | 0

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what does this line mean
ones(r, c) creates an array of ones with r rows and c columns. That said, ones(1, c) creates a line vector with c elements. Her...

4 years ago | 0

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I have a set of nonlinear equations (run by rk4 method). How can I compute the Jacobian for those?
Assume you have the set of nonlinear eqations and the vector of independent variables defined in Matlab, then you can use the j...

4 years ago | 0

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Write value to gauge in MATLAB design app
In the inspector, look for the label of the gauge. Originally it is labeled as "Gauge". You also see this on the code page insid...

4 years ago | 0

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Get every possible combination of an array
This could be a starting point: clearvars, close all clc arr = [-1 1 -1 1 1 1 1 1 -1]; num_arr_elements = numel(arr); ...

4 years ago | 0

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how process sequence of the images in a loop without overwriting
Have a look at your first for loop. Here you are generating a char called fileName which is overwritten in every loop count. fur...

4 years ago | 0

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Deleted on request by my prof. Sorry
I assume that In your code line 28 it should be t(j) and t(j-1) instead of t(n) and t(n-1) respectively. Then your code at least...

4 years ago | 0

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Data loading in MATLAB
Hi, have a look at uigetfile and uiopen which open a file selection dialog box. This should solve your issues. Regards, Benni...

5 years ago | 0

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How to plot data from different folders
You can get the file information (name, folder, date, ...) of files within subfolders using the dir command and wildcards. e.g. ...

6 years ago | 1

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How to use a double index with a restriction under a for loop along with indicator function to calculate the occurrence of a given state
Sorry, i do not understand your condition and explanation for "if abs (x(i)- x(i-j))= j then S(x)=1". x is a vector. Do you want...

6 years ago | 0

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Z must be a matrix, not a scalar or vector
You calculate Z (or Q2) using variables that you do not provide us. so it is not possible to give an adequate answer. Is Q2 a ma...

6 years ago | 0

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Moving average on window of latest inputs with Exponential Weighting method
One possibility is to use the discrete filter block with denominater = [1] and Numerator are the exponential weights. If you do ...

6 years ago | 0

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how i can use nntool with a scipt
Use nnstart instead of nntool ("nntool is no longer recommended"). Within nnstart you can choose your tool (nftool, nprtool, ...

6 years ago | 0

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How can I define these on matlab?
When f is a function, then you can not "define" something like f(low) = ... because the stuff in brackets is passed to t...

6 years ago | 0

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Use of loops to print the contents of a cell array with varying number of rows
Use a struct array instead of cell array and then disp inside an arrayfun: clearvars close all clc system(1).Title ...

6 years ago | 0

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Deriving the time-domain response of an equation, from a tf
Try <https://de.mathworks.com/help/symbolic/ilaplace.html ilaplace>. Before that you have to convert the tf object to sym object...

6 years ago | 1

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I don't get the answer that i want?
What is the purpose of your code? You prompt for iii (3xi) and loop through iiii (4xi); Within the loops nothing changes, right?...

6 years ago | 0

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Is there a script function or variable to determine if running on desktop?
From the documentation: USED = desktop('-inuse') % returns whether or not the Desktop is currently in use. It does not sta...

6 years ago | 1

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Im ploting a graph where my x axis is in time format. How do I adjust the intervals of the x axis to be 15 minutes? Start at 00:00:00 ending at 23:45:00
You can get the char array containing your requested date values by charArray = datestr(0:minutes(15):hours(23.75),'HH:MM:ss...

6 years ago | 0

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How to make a softer plot using a moving average every ''x'' skips?
If you have signal processing toolbox than you can use moving average filter or more advanced filtering techniques as described ...

6 years ago | 0

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How to concatenate variables from the workspace with a constant part in their name?
You can use the cell returned by the who command and pass it to the "eval" function to get the values of the variables. You coul...

6 years ago | 0

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saving all figures as jpeg file on harddrive
Collect all the figure handles in a figure handle array, e.g. f(ii) = figure; and then work with arrayfun on the saveas command...

6 years ago | 0

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I want to find particular values of t at which y becomes 2 (by writing some commands in code itself). Can I extract such values of t as a vector?
You could rewrite your function so that your wanted data points are maxima and search them with findpeaks. [~,locs] = findp...

6 years ago | 0