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Matlab newbie - what is wrong with this function?
When you select multiple files, the output in Filename is a cell array, not a string, so it won't work in strcat the way you exp...

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Writing a function that returns the 5 coordinates to draw a square?
The nice thing about Matlab is that, for simple equations, the correct syntax looks almost identical to how you would write the ...

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Plot 3d, z = f(x,y)
If you have the Curve Fitting Toolbox, doc sfit doc sftool

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Beginner Question -- IF loop (code at beginning of post)
For the input issue, use the option 's' to convert the input to string at the prompt, and then use str2double() to convert it to...

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unique rows of matrix
You can easily perform the task using: A = unique( B(:,[1 3]), 'rows'); But of course, this forms the intermediate mat...

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Can anybody help me with what this kind of thing means In MatLab
Each of the idx_rX... variables are the output of find, and are indicating the indices of where the expression inside the parent...

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Getting mouse coordinates with x and y attached to them and displaying them in excel.
Convert x and y to cell arrays with the desired leading text ('x' or 'y'): xs = [ repmat('x', size(x)), num2str(x)]; ys ...

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matrix operation make matrix
A = reshape(repmat((1:8), 8, 1), 1, []) b = repmat(1:8, 1, 8)

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how can i find out the minimum (x1,y1) and maximum (x2,y2) cordinates of any image in matlab in the form of minimum boundary ractangle ?
First, you will need to threshold the desired region of your image (i.e. the portion for which you want to find the boundary rec...

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finding maximum abs value of four images
No loops necessary: CombinedImages = cat(3, I1, I2, I3, I4) I5 = max(abs(CombinedImages),[],3)

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does an "if does not contain operator" exist
The "if does not contain" operation can be done with ismember, using something like: notPi = ~ismember( user_input, pi) ...

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Syntax to comment/uncomment line(s) of code in a Matlab script
There is no way (at least as far as I am aware) to comment out lines programatically. However, even if you could, this is almost...

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Problem with if statments
The error is because you are comparing a vector of (presumably) 1000 elements to another vector of 1000 elements. Thus, when you...

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How do I take the average of a zeros vector without dividing by the unpopulated zeros?
So basically you just want to exclude zeros from your mean? notZero = (handles.vxdata)~=0; handles.speedavg = mean(handl...

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Coincidence detector in Matlab
How about something like this? (I assume all signals are sampled synchronously). edges1 = find(diff(Signal1) > 0); %get ri...

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How to use the If function to find and replace symbols in an equation?
I think you want to use subs() to set the zero terms: a=subs(a, {'A1_' ,'A2_', 'A3_'}, {0,0,0}); You wouldn't be able to...

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How to delete a ROI after having drawn a new one
Probably the most robust way is to save the handles to imrect/impoly and then delete just that object. Something like this: ...

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quick question about string read
Use the functional form of load, i.e. load(a1);

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Evaluating incomplete elliptic integrals in MATLAB
I've used this set of functions in the past to evaluate incomplete elliptic integrals: <http://www.mathworks.com/matlabcentra...

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Wanted features for UITABLE and UITREE
It would be nice to be able to update the contents of a single uitable cell without "flicker". As it stands now, it is easy to m...

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Why am I getting a matrix when [I think] I should be getting a vector?
It's because in your second calling of the function [maxV, minV] = myFunction(volume, bins) you are setting the first o...

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License Plate Recognition - need help to improve code.. :)
Hi Michal, You might have more luck thresholding the three color planes (red, green, and blue) separately, rather than thresh...

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Find moving average with filter
Or even easier, go to the "Help" in Matlab, and search "moving average filter". The first or second link (the one entitled "Exam...

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How to save MAtlab output in a file that you can reopen later?
Save your workspace as a *.mat file is easiest. You can use File->Save Workspace As from the menu or using the 'save' command. ...

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Selecting text from a .txt file
Hi Drew, First, you just need to import the data from the file into Matlab. Easy enough: data = dlmread('/path/to/your...

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Need help to save data from getkey into the file by using fprint
Hi Maliheh, Based on what you have specified above, I think this will work: %note that you will need to define the parti...

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How to display minimum vaue of a Surface z-axis.
You can do this using text() function. Something like this: %Xval, Yval, and Zval are your MxN matrices used to make the su...

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problem with reading MRI image (dicom)
Hi D C, It's probably just a display issue. When using imshow, try setting the DisplayRange to autoscale, i.e. imshow(...

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can i do this program in matlab
Hi joy, Your question is a bit unclear. It sounds like you are trying to do two different things: 1) You want to write a new...

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Hello, I am trying to fit some data points with an exponential equation.
Hi Krish, There are a couple of different ways to do this. Do you have the Optimization Toolbox or Curve Fitting Toolbox? If ...

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