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how do you print the counter value in an input statement?
Use |sprintf|, e.g., input(sprintf('please enter wall #%d U-factor:',k))

14 years ago | 0

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Efficient Row x Collumn multiplication
sum(A'.*B)

14 years ago | 1

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dir() function not working?
You need to use oldFileName = files(k).name see http://www.mathworks.com/help/techdoc/ref/dir.html

14 years ago | 0

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Butterworth filter
Butterworth filter is a part of Signal Processing Toolbox. If you type ver in your command line, can you see Signal Proc...

14 years ago | 0

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frequency estimation
If you have Signal Processing Blockset or DSP System Toolbox, you can use the FFT block http://www.mathworks.com/help/toolbox...

14 years ago | 1

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Convert a column of dates
try |cellfun| cellfun(@datenum,... see the doc doc cellfun

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How can I put a line into an existing subplot
Do you have to use |line|? You can try plot(allAxes(6),[a a],[b b]);

14 years ago | 1

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Insert Degree Symbol in Axes Title
By default, |title('20^{\circ}')| should work. If not, you can do title('20^{\circ}','Interpreter','tex')

14 years ago | 6

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Folder names in MATLAB project
Those are folders for MATLAB class files. Take a look at this documentation http://www.mathworks.com/help/techdoc/matlab_oop/...

14 years ago | 2

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overwrite a text file with other data
Use 'w' option to open the file fid=fopen('testdata','w'); fprintf(fid,'%d %d %d',3,6,9); fclose(fid); For details...

14 years ago | 0

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little problem in plotting a signal. Both x, y has the same lenght but is not plotting correctly
Yes you don't need to write the loop, if you mean for imaginary part, then it is R = 1i*Tc*sinc(f.*Tc/2).*sin(pi*f.*Tc/2) ...

14 years ago | 0

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little problem in plotting a signal. Both x, y has the same lenght but is not plotting correctly
I don't think |a| is the issue here. In your R(a), do you mean pi instead of i for the first term? BTW you should be able to ...

14 years ago | 0

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How can I select lines in a subplot and delete them?
If you don't need to automate the process, it's actually easier to do from the figure window. Just click the arrow on the toolba...

14 years ago | 1

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How to close Simulink model subsystems
doc bdclose doc close_system

14 years ago | 0

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Solving for a single unknown (non-linear equation)
Move 6.2 to the right side of the equation and then use |fzero|. doc fzero for example, to solve x+1 = 2 fzero(@(x)...

14 years ago | 0

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how sort just nonzero values?
Do you want to keep all zeros at the original location? If so c = [8 4 5 1 0 0 0]; c(c~=0) = sort(c(c~=0));

14 years ago | 0

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file management
You can use |dir| to read in the file listing in the current directory. Then you can use |input| to get the the file name from c...

14 years ago | 0

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Help!!!!!!!! How to replace all the negative values in an array with zeros?
Did you delete your original question? I answered this several days ago. Please do not delete your question. Instead, if the ans...

14 years ago | 2

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resize of axes
There are many functions doc xlim doc ylim doc axis

14 years ago | 0

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Rather trivial question
Use |...| For example t = 1 + ... 2

14 years ago | 0

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HOW TO PLOT A CHIRP SIGNAL WITH BIDIRECTIONAL SWEEP
You can connect two signals together. Say you want to sweep from 0 to 100 Hz in 1 seconds and then sweep down. T1 = 1; F...

14 years ago | 0

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Function Error not understood
You may want to use |X.^n| to achieve element-wise operation

14 years ago | 0

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Column Circulant Matrix
gallery('circul',[1 2 3])' You can then take the first L columns

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Matrix division to solve Ax=b
Use x = a\b see the documentation doc mldivide doc mrdivide

14 years ago | 0

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index out of bounds because numel(c)=2
You have an issue with your algorithm. You are growing your c and d at each iteration. When j is 2, it never went into the part ...

14 years ago | 0

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Pls help me generate circulant matrix
You may want to use M:-1:M/2 in your code, or something like that. M:M/2 returns an empty vector so there is n...

14 years ago | 1

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Matrix Input
You can either save the matrix into a variable and then pass that variable to |input|, or write matrix at the prompt using delim...

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How to plot 3D data on a plane by color
You can also try |image| or |imagesc|. doc image doc imagesc

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