MATLAB Answers Wish-list #5 (and bug reports)
I realised I posted this in the ancient wishlist thread before. Can we not have some white space back between answers? Since t...

3 years ago | 1

How to ignore letters in a numeric cell?
cellfun( @(x) str2double( erase( x, 'mm' ) ), pin_radius ) should convert them to an array of doubles. If you are using pre R2...

3 years ago | 1

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why do I get Array indices must be positive integers or logical values?
It means pretty much exactly what it says. In Matlab x1, as you create it, is an array of values representing your function at ...

3 years ago | 0

expand length of matrix to fixed value
t = interp1( 1:108, t, linspace(1, 108, 200 ) ); would be one way to do it.

3 years ago | 1

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Create a plot with a drop down menu in an App
app is your main application object. You can add properties to this yourself, which you can then access in any of its functions...

3 years ago | 1

Area plot does not recognize colormap
What was your 'older Matlab version'? If you keep the handle from an area plot you get an object (or objects, if you feed it a ...

3 years ago | 0

Well, after the last update of Matlab Answers my biggest wish is now to put the white space back between the answers! I don't k...

3 years ago | 0

How to manipulate array?
Just use it! Where you are going to use my_columns, just use number_columns, e.g. newMatrix = zeros( number_rows, number_colum...

3 years ago | 0

How can I use my CNN after training (Image Recognition)
When you saved the file the network was called 'thisNetwork'. That is what this instruction saves: save('TheTrainedCNN','thisN...

3 years ago | 0

How to know where the >> are in the command window?
Just use fprintf('AAAAAAAAAAAAAAA\n') instead and it will put the new line at the end so that the >> will be on the next line ...

3 years ago | 0

simple way of matrix array resorting
Q = [A', B', C'];

3 years ago | 0

Avoiding many if-Statetments in a for-loop
Something like this would seem to do the job, off the top of my head, though I may be over-simplifying it... case1 = V2 && V3; ...

3 years ago | 0

What does z(1) and z(2) mean in that context?
z(1) and z(2) mean the same as they would in any code - there is an expectation that z is an array with (at least) 2 values, oth...

3 years ago | 2

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Index must be a positive integer less than or equal to the number of test sets.
selectBatch(k) is a cell array, which clearly is not an integer. selectBatch{k} may be what you want instead. That said, you...

3 years ago | 0

check a condition once and remember it later in the code
Potentially you can change your if statement to the following, but it depends on what nu is as this does not seem to be defined ...

3 years ago | 1

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Variable inside timer callback is lost after first iteration in GUI - undefined function or variable
This seems like the opposite problem to what I originally thought it was as I got distracted by the handles and assumed they wer...

3 years ago | 1

Increase levels on colorbar
If you create the colourbar and keep its handle, e.g hColourbar = colorbar( hAxes ); then you can edit the properties of the c...

3 years ago | 0

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Question

Working with 1d vector sequences
This is a problem I seem to come up against quite often in Matlab and have never really found a good solution to. Maybe there i...

3 years ago | 2 answers | 0

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(Index in position 1 exceeds array bounds (must not exceed 1). error is popping up where it does not seem to apply
Well, I don't know about line 12, which (from counting - please indicate which is the line of the error message in future, it wo...

3 years ago | 0

Store only 4 value from a loop
If you have a nested loop like that you would generally want something like x(t,i) = ... with a 2d output to match the 2 neste...

3 years ago | 0

Detecting change in sign of values of a column
NewC = find( diff( sign( Data(:,2) ) ) ) + 1;

3 years ago | 1

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How to reshape a matrix into nx2 matrix?
reshape( A( :, [ 1:2:end, 2:2:end ] ), [], 2 ) You may wish to change the final two arguments to the reshape command in diffe...

3 years ago | 0

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Unable to use a value of type cell as an index
You are passing in a variable called title to the second function. This will hide the function of the same name so that this in...

3 years ago | 4

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Assining fixed color for zero value
Define a colourmap of size n, assuming n is not huge, and then add black to the front of it n = 7; colourmap = [0 0 0; parula(...

3 years ago | 0

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Any way to use British spellings for function calls and arguments?
https://blogs.mathworks.com/loren/2016/04/01/the-queens-matlab/ I took this seriously at first and was appalled! Not because I...

3 years ago | 2

https://uk.mathworks.com/help/matlab/matlab_prog/fundamental-matlab-classes.html In basic terms obviously floating point (doubl...

3 years ago | 0

How to concatenate 2 cell arrays containing strings?
vertcat( x{:} )

3 years ago | 0

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Why do I need to declare a variable inside a nested 'for' loop?
You are referring to it on the right-hand side of the equation as well as on the left. First time round it does not exist yet s...

3 years ago | 1

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