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cannot create mat file.
You should do this: filename = 's2.wav'; [y, Fs] = audioread(filename); save('s2.mat','y');

8 years ago | 0

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I have a project concerning a grayscale picture
The image has the salt and pepper noise. You can remove it using medfilt2 (Image Processing Toolbox)

8 years ago | 0

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Keep getting error: Maximum number of function evaluations has been exceeded - increase MaxFunEvals option. Current function value: NaN
Not completely sure what the problem is but you can remove the NaN entries from the array. Lets say your array of size 100x1 is ...

8 years ago | 0

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How to unfold (spread) vector?
You can use interp1. Try this: newRange = linspace(1, numel(corr), numel(env_energy)); newCorr = interp1(1:numel(corr)...

8 years ago | 0

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Answered
How to define a range to iterate with gaps in between?
Try this: range = [1:10, 15:20, 25:30];

8 years ago | 0

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Answered
How to get the pathname and filename of some files that I have chosen?
You can do this: [filename, pathname] = uigetfile(type, 'Select Multiple Files','MultiSelect','on'); numberOfFiles = l...

8 years ago | 1

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Answered
for loop and break!!!
Break will work for the loop it is in, so the second for loop. It is always good to run an example and check: for i = 1:10 ...

8 years ago | 0

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Subplot displacement against time
You should do this: figure(1); subplot(2,1,1); Change figure(2) to figure(1) and change subplot(2,2,1) to ...

8 years ago | 0

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Hello everyone! I need some help regarding creating a dynamic/flexible array/matrix in matlab?
Use a cell array. d1{1,h} = find(C1(:,:,h));

8 years ago | 0

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Answered
How can i collect number without using eval function ?
You can try something like this: in = input('Please enter a number:','s'); s = strsplit(in,'+'); result = sum(str2...

8 years ago | 3

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Answered
How can I change/replace values in second column according to conditions?
Try this: T = A(:,2); a = [1,2,3,4,13,14,15,16]; b = [5,6,7,8,17,18,19,20]; c = [9,10,11,12,21,22,23,24]; T(ismember...

8 years ago | 0

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Answered
erorr in for loop
.^ is for element wise operation. Use this: w=0:0.02:5; for i=1:length(w) a(i)=w(i)^4-12*(w(i)^2); b(i)=w(i)^8...

8 years ago | 0

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Image processing: moving window correlation between two image
Try this: correlation_coefficient = corr2(A,B); % A and B are sub-images of the original images

8 years ago | 0

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How can i collect number without using eval function ?
You mean something like this: Number=input('Enter Number please:','s'); eval(['result = ' Number])

8 years ago | 0

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Please... I want to import several excel files at once. used for_fuction
You can try this: oldfolder = cd(source_dir); xlfiles = dir('*.xlsx'); nfiles = length(xlfiles); for i = 1:nfiles ...

8 years ago | 0

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passing character strings into functions
You can use a cell array: picturnames = {'IMG_1562' 'IMG_1563' 'IMG_1564' 'IMG_1565'}; Pass picturnames to the function ...

8 years ago | 0

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If I have a function with 1 input producing 3 outputs; ran a small program loop to produce multiple outputs; how would I print out the input and 3 values in that order for the first 12 outputs.
You mean something like this? fprintf('Input: %d, Output1: %d, Output2: %d, Output3: %d\n', inp, out1, out2, out3);

8 years ago | 0

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Answered
how to use matrix of three variables
Not sure what you want but something like this: final3DMatrix = zeros(77,77,10); for i = 1:10 final3DMatrix(:,:,i) =...

8 years ago | 1

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If statement (in master GUI) to call slave GUI and then have the slave edit value in master and program continue in master.
Why do you want a separate GUI for that? You can just use a questdlg for that. Try this: val = questdlg('Are you sure it ha...

8 years ago | 0

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how can i do this operation?
As you can see M and X are of different sizes, you cannot perform a subtraction operation on them. Maybe you can do this: M...

8 years ago | 0

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How can I get dynamic naming variables? So in a loop i need variables with names A1,A2,A3...... logic?
You can use eval. Try this: for i = 1:10 eval(['A' num2str(i) ' = i;']); end

8 years ago | 1

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Getting a variable from an Edit box, using a push button.
It will not go to your workspace directly. To save the value to the workspace do this: age = str2double(get(handles.AgeEdit...

8 years ago | 0

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Answered
When many figure windows present, the pause command doesn't work
I think it takes 20+ seconds because you first close all the open figures while the tic has already started. It computes all the...

8 years ago | 0

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Reading audio file using GUI pushbutton and saving them to a folder
You can start with this and then continue: [filename, pathname] = uigetfile('*.wav', 'Select a wave file','MultiSelect','on...

8 years ago | 0

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How to convert a column date wich contains NaN?
You should remove the NaN entries first. DO this: T(isnan(T)) = []; D= datenum(num2str(T),'yyyymmddHHMM'); C= datestr...

8 years ago | 0

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I want to display the results shown in command window by clicking push button.
You should always share some code with questions like these. Lets say the handle to the textbox is 'display_text' and the output...

8 years ago | 0

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how to do this operation to calculate a new matrix ?
Try this: N = 10; m = size(A,1); % Pre-allocate the F_Complete matrix F_Complete = zeros(m, N) for i = 1:m ...

8 years ago | 0

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Answered
How can I filter a date column so it just considers every 5 minutes observations for each day?
You can use the mod operator. Lets say the data vector is x and it needs to rearranged in C. Try the following: C = cell(1,...

8 years ago | 0

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