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I'm having problems running input functions in matlab, does anyone know why?
There is nothing wrong with your use of INPUT, so something else is going on. Tell us the name of the script, and show how you ...

13 years ago | 0

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Can anyone show me how I can avoid following for loops
Here is a one approach: M = diag(repmat([1 4],1,1000)) +... diag([repmat([2 0],1,999) 2],1) +... diag(...

13 years ago | 0

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How do I find the zeros of my function?
Here is a simpler approach: x = (-2:0.01:2); y = @(x) 2*x.^4-3*x.^2+x-7; plot(x,y(x)); hold on; cnt = 1; f...

13 years ago | 1

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How can I can I trigger the callback of an edit text control when setting its value from within the callback of a slider control?
Editbox callbacks execute when you hit return with the cursor in the text field. You can also just set the string from the slid...

13 years ago | 0

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how can I generate a random matrix?
You will of course have to make sure that x==m*n, as you describe it. f = @(x,m,n) reshape(randperm(x),m,n); f(20,5,4)...

13 years ago | 1

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Answered
Is there anything wrong to my code?
I don't think you have told the whole story: >> N = '9A'; >> b1='9'; >> (((N(end)=='A' || ... N(end)=='B' |...

13 years ago | 0

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Answered
Finding rows in a matrix
Another: % The given matrix A = [1 2; 2 1; 1 2; 2 2; 1 1; 2 2]; % Now find the counts. [I,J,K] = unique(sort(A,2...

13 years ago | 0

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Answered
changing part of the name of a variable inside a "for" loop
Do not program this way! The use of eval is *slow*, *hard to read*, *difficult to process*, works without taking advantage of *...

13 years ago | 4

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Removing specific characters in a string?
str = 'The quick brown fox jumped over the lazy dog'; strn = regexprep(str,'[tixy]','')

13 years ago | 4

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How can I add a char in a matrix?
A = sprintf('%i',1:5); % Make a character array. A(6) = 'B' If you must have spaces, then you must be more careful abou...

13 years ago | 0

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how can I stick together the data in a matrix?
A = 1:5 B = str2double(sprintf('%i',A))

13 years ago | 0

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question about multi variable data fitting
Give this a try: g=fittype('a*exp(-(x-b).^2/c.^2-(y-d).^2./f^2)','inde',{'x' 'y'},'dep','z'); or, use a function handle:...

13 years ago | 0

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removing parentheses around digits using regular expressions
regexprep(str,'($)([\d*\.]+)($)','$2')

13 years ago | 1

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How do we sort one column of an alpha-numeric table and make the other columns to adjust accordingly?
When I import as you explain, I get this: A = [10x1 double] [10x1 double] {10x1 cell} So if your A doe...

13 years ago | 2

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what is subplot and how to use it?
figure subplot(1,2,1) plot(1:10) subplot(1,2,2) plot((1:10).^2) help subplot

13 years ago | 1

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Problem in using 'break' and 'while'
This will prove to you that the break statement *does* work: x= rand(); a=0; s=0; while 1 % Infinite loop...

13 years ago | 1

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How to concatenate data points
I am a little uncertain that this is what you want. But just to get started is this solving the actual problem? A = ...

13 years ago | 0

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using fzero to find root of nonlinear equation
To highlight what Matt J said in a comment, you have a problem with your function definition: F = @(x) x.^q2*(r+p-r.*q1...

13 years ago | 0

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MOD bug? Or something else?
Floating point arithmetic.... Look closely at the numbers. x = [-2:.2:2]; fprintf('%16.16f\n',x) You can read more ab...

13 years ago | 0

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Answered
Accessing certain Dimension of Multidimensional Array
Here is how I would do it: % A is given, up to 8 dims here. A = rand(max(2,randi(4,1,max(3,randi(8))))); idx1 =...

13 years ago | 4

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Error message: "undefined function for input arguments of type 'logical' "
It indicates that there is no function by the name that you called for inputs of the logical type. So either you called a funct...

13 years ago | 0

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How to identify a window created by system command
What do you mean, "move it into my GUI window"? You cannot have a figure be a child of another figure, if that is what you are ...

13 years ago | 0

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terminating a script with a quit comand
Since the SWITCH is in the loop, why not just set choose to 10 if the user wants to quit? Then the loop condition will fail and...

13 years ago | 0

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How to use Floor command
You have fallen into thinking that you are using infinite precision arithmetic when you are only using double precision. This i...

13 years ago | 0

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Avoid for loops with if inside
Just taking this outside all loops will *GREATLY* speed it up. g = fit(x',y','splineinterp'); Beyond that, you could...

13 years ago | 0

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Coeffs of non linear product terms
I think a FOR loop would be fast enough here, but.... syms x y [c, v] = coeffs(x+y+2*x*y,[x,y]); C = arrayfun(@ch...

13 years ago | 0

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Answered
Problem with ASCII characters in MATLAB
From the doc: "char(X) converts array X of nonnegative integer codes into a character array. Codes *from 0 to 127* correspo...

13 years ago | 1

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How to Insert desired rows from one matrix into a new one
v = [2 0 0;1 0 1;4 5 6;-1 1 2; 2 3 4] % Sample array. P = v(sum(v,2)==2,:)

13 years ago | 0

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I need an example of a defined function in M-files
# From the command line, type this: edit # Copy the code below. # Paste it into the blank window that opened from step 1. ...

13 years ago | 1

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Error: Function definitions are not permitted at the prompt or in scripts.
Don't try to define a function at the prompt or in a script. Put functions in their own M-files.

13 years ago | 1

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