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A For Loop Question.
You do not need a for loop for this x = [1 8 3 9 0 1]; sin(x) In this: i=1; while (i<=10) disp(i); i =...

14 years ago | 0

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Comparing images
You could do diffim = double(X)-double(Y);

14 years ago | 1

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filter coefficients
That depends. The filter coefficients are the coefficients of the difference equation. If your filter is an FIR filter, then the...

14 years ago | 1

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Answered
cumsum of a matrix
X = 1:100; X = reshape(X,10,10); X1 = cumsum(X(:));

14 years ago | 0

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time series plot
Did you use datenum and datetick? t = (1900:10:1990)'; % Time interval p = [75.995 91.972 105.711 123.203 ...

14 years ago | 0

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wav format data type in matlab
You most likely did not use the format option available in wavread.m [y,fs] = wavread(file,'native'); If omitted, this...

14 years ago | 1

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how to calculate central frequency from fft of wave function
It appears to me that just rewriting that using trigonometric identities you see that it equals 1/2*sin(2*pi*f*t)-1/4*sin(2*p...

14 years ago | 0

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"This kind of expression is not supported"
Hi Adam, have you read this: <http://www.mathworks.com/help/toolbox/eml/ug/bq5zw7l-1.html>

14 years ago | 1

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how to calculate central frequency from fft of wave function
Are you trying to show us an AM signal? If so, are the two f's really the same frequency, or did you mean something like this: ...

14 years ago | 0

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anova1 within groups degree of freedom ?
strength = [82 86 79 83 84 85 86 87 74 82 78 75 76 77 79 79 77 78 82 79]; alloy = {'st','st','st','st','st','st','st','st',...

14 years ago | 1

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Answered
command in Matlab equivalent to "forall " in fortran
A = 1:10; A = A.^2;

14 years ago | 2

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blanks
s = 'Have you tried deblank? ' s1 = deblank(s); length(s) length(s1)

14 years ago | 0

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matrix
If n and r are not equal, you can't. Unless there are some details that you are not telling us.

14 years ago | 0

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Tidal prediction
Hi Dany, you are most likely not scaling the estimates by the length of the input vector. For example. t = 0:0.001:1-0.001...

14 years ago | 1

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Error in linear regression with predefined error in y
polyfit returns a least-squares fit, but not with weights as you suggest. Do you have the Statistics Toolbox? If so consider, ro...

14 years ago | 0

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How to set yaxis equal to each other in a subplot of two scalograms made from two different Motherwavelet?
OK, so explain to me what is wrong with this. Yes, of course you will have to use different scale vectors for different mother w...

14 years ago | 0

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error in storing values
Don't use the same variable below, use a different variable. PSNR = 20 * log10 (255 / sqrt(S)); PSNRS(xx) =PSN...

14 years ago | 0

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Finding matches for a vector
Use ismember [~,locb] = ismember(a,signal_vector,'rows'); locb is equal to 5

14 years ago | 0

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which pem is called by pem_
How about just using dbstop in FILESPEC to set a breakpoint for pem.m?

14 years ago | 0

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Storing matrix value
A = [ 6 2 3 7 9 0 8 3 4]; [minval,I] = min(A(1,:)); z = A(2:end,I);

14 years ago | 0

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which pem is called by pem_
It's calling matlab\toolbox\ident\ident\pem.m

14 years ago | 0

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How to set yaxis equal to each other in a subplot of two scalograms made from two different Motherwavelet?
Hi Katrine, Have you tried set(gca,'ylim',[minfreq maxfreq]) So something like: t = linspace(0,5,5e3); x = co...

14 years ago | 0

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How to generate random 1x8 integer matrices without repeating numbers in Simulink?
If you have Communications System Toolbox, you can use the random integer block. If you do not have Communications System Toolbo...

14 years ago | 0

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how to define 'Y' in fitensemble function (Matlab 2011a)
If you are doing classification as you are with 'AdaBoostM', then Y should be a categorical variable, character array, or cell a...

14 years ago | 0

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calculating the time
Just save the CR values in a vector, then query which one is the max

14 years ago | 0

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cell of string. Vectorization on elements of string
stringCell{1,1}='test1' ; stringCell{2,1}='test2'; out = cellfun(@(x) x(5),stringCell,'UniformOutput',0); out = str2nu...

14 years ago | 0

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Answered
calculating the time
You can use tic and toc. t = zeros(1,100); for n = 1:100 A = rand(n,n); b = rand(n,1); tic x = A...

14 years ago | 1

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Answered
??? Undefined function or method 'fftshow' for input arguments of type 'double'.
What is fftshow.m ? That is not a MathWorks' function or method. If you have downloaded this MATLAB program from somewhere and s...

14 years ago | 0

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Where is PDF version of the DSP Reference manual?
Hi KE, Honglei is correct about the general location of the PDF documents. However, MathWorks is no longer producing PDFs of ref...

14 years ago | 0

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Filter design - are taps the same are difference equation coefficients?
Yes, they are. The filter coefficients are also call taps, or tap weights.

14 years ago | 0

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