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Adam


Last seen: Today
1,893 total contributions since 2014

Professional Interests: Signal Processing, OOP, Matlab GUI programming, Machine Learning

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

22 hours ago | 1

Answered
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...

2 days ago | 0

Answered
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 ...

2 days ago | 0

Answered
Wish-list for MATLAB Answer sections.
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 days ago | 0

Answered
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 days ago | 0

Answered
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 days ago | 0

Answered
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 ...

1 month ago | 0

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

1 month ago | 0

Answered
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; ...

2 months ago | 0

Answered
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...

2 months ago | 2

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Answered
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...

2 months ago | 0

Answered
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 ...

2 months ago | 1

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Answered
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...

2 months ago | 1

Answered
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...

2 months ago | 0

| accepted

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...

2 months ago | 2 answers | 0

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answers

Answered
(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...

2 months ago | 0

Answered
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...

2 months ago | 0

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

2 months ago | 1

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Answered
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 months ago | 0

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Answered
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 months ago | 1

| accepted

Answered
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 months ago | 0

| accepted

Answered
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 months ago | 2

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

3 months ago | 0

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

3 months ago | 0

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Answered
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 months ago | 1

| accepted

Answered
signal processing (segmentation in time domain)
sig1 = sig( t >= 0.34 && t <= 4 ); sig2 = sig( t >= 6 && t <= 8.5 ); If you also need the t vector then apply it similarly. J...

3 months ago | 0

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Answered
finding inverse exponential value
If i and j are pixel values then you must have an image to which they are applied, e.g. im, in which case simply exp( -im(i,j) ...

3 months ago | 0

Answered
Reference to non-existent field error
exist('handles.mystructdata') does not work for struct fields. isfield( handles, 'mystructdata' ) is what you should use to c...

3 months ago | 1

| accepted

Answered
How to replace values of certain rows in a matrix?
a( [2 3], : ) = repmat( b, 2, 1 ) A bit more generally: indicesToReplace = [2 3]; a( [2 3], : ) = repmat( b, indicesToReplace...

3 months ago | 0

Answered
FFT step by step help
The lpad part is a little suspicious. If you have an odd length of signal it will not work as is. Apart from that though: xdf...

3 months ago | 1

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