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Subscript indices must either be real positive integers or logicals.
In that line you are indexing k and a as if they were variables. you need to insert a * in two spots. You have 'a(' instead of...

oltre 12 anni fa | 1

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Plots Stacking when it is unwanted.
Your description of the problem is not clear. Do you want to put a: hold off as the last line of this section of code?

oltre 12 anni fa | 0

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Risposto
How can I make a for loop with two diferent indexes
syms w; cnt = 1:.2:20; for ii=1:length(cnt) xi = fsolve(@(w) -tan(w/2) + w/2-4/ii*(w/2).^3,[1 3]*pi-.1); ...

oltre 12 anni fa | 0

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code without for loop
idx = sub2ind(size(mask),index(:,1),index(:,2)); mask(idx) = 255;

oltre 12 anni fa | 0

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Adding a title to a graph
title(sprintf('Beam %s Beam \n%6.2f lb. applied to a %s %s'... ,'gold',200,'joist','pooter'),'fontweight','b'); This w...

oltre 12 anni fa | 0

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store string in array
What do you mean the INPUT function only lets you input one character? >> G = input('Enter a string: ','s') Enter a ...

oltre 12 anni fa | 0

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Risposto
Is it possible to use exist function in a loop?
Did you try it? The help for EXIST indicates you can use it as you are doing.

oltre 12 anni fa | 0

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Risposto
How to copy XTickLabels?
xticlabel is not a child of the axes, it is a property of the axes. f1=figure; ax1=axes; plot(data); set(gca,...

oltre 12 anni fa | 0

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Risposto
random permutation of 3 numbers when repetition of digits are allowed
Give this file a try: <http://www.mathworks.com/matlabcentral/fileexchange/11462-npermutek NPERMUTEK>. It solves the general pr...

oltre 12 anni fa | 1

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How to populate a listbox from a pop up menu
Set the string property. set(handles.listbox1, 'string','Restaurant')

oltre 12 anni fa | 0

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Plotting a Piecewise function?
First define this in an M-file: function [F] = myfunc(thet) % help F = zeros(size(thet)); idx = -pi/2 <= thet & th...

oltre 12 anni fa | 0

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What is the difference between exp and expm in terms of a matrix ?
<http://www.mathworks.com/help/matlab/ref/expm.html EXPM Documentation> If you look at that link, the difference is explained...

oltre 12 anni fa | 0

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index of a mnatrix to negative
No. MATLAB has the first index as 1.

oltre 12 anni fa | 0

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Generating A(i,j) = [i; j]
You want each element of your matrix to be a two element vector? That is not a matrix, but it does sound like a cell array. ...

oltre 12 anni fa | 0

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Risposto
Vector imbalance error in while loop
You may have meant: y1(i) = (F.*x(i).^2/6*E*I).*(3*a-x(i)); % 0<x<a Otherwise you are trying to put numel(x) elemen...

oltre 12 anni fa | 0

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I'm getting a plotting length mismatch error but my lengths match
You are calling PLOT incorrectly. PLOT only takes the variables to be plotted and lineseries properties, not axes properties. ...

oltre 12 anni fa | 1

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element wise multiplication and sum
I don't know where the 15 came from. I assume you mean 12. >> a = [1,2,3;4,5,6]; >> b = [2,2,2]; >> a*b.' % same...

oltre 12 anni fa | 2

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Risposto
Error: Attempted to access x(101); index out of bounds because numel(x)=100.
You want 0 < x(i) && x(i) < a Your expressuon evaluates to: 1 < a Because MATLAB evaluates from left to right....

oltre 12 anni fa | 0

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Risposto
finding index of several values within a vector efficiently
idx = [1 2 5]; X = [1 5 4 3 2]; vals = X(idx) % linear indexing.

oltre 12 anni fa | 0

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how to create 2 matrices from 1 matrix depending on values 0 & 1, displayed in first column of 1st matrix?
Now I think I see what you did. You probably did not realize that the | symbol evaluates to logical OR when someone copies and ...

oltre 12 anni fa | 0

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Risposto
what's the relation between a resolution and the size of pixel?
Sounds like it. Resolution is how many pixels per unit linear measure, so in the U.S. we would say 1/pixelsize = 1/(.254) =...

oltre 12 anni fa | 0

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Why/How does MATLAB run faster when the workspace is full of variables?
I would be willing to bet that reason you experience the speed increase is that when you issue the CLEAR command you are not onl...

oltre 12 anni fa | 2

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Risposto
GUI Program Crash on .fig Load
More details may be necessary. Did you make all of the changes through GUIDE? Did you save them as you went (change-save-check...

oltre 12 anni fa | 0

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Risposto
Can anyone help me to get this PV=nRT working? please.
Change your FOR loop to this: for jj=1:length(V) % Note, length(V), not 10! P1(jj)=T1*R*n/V(jj); P2(jj)=T...

oltre 12 anni fa | 1

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Risposto
In an assignment A(I) = B, the number of elements in B and I must be the same.
Have a look at this: A([1 2 3]) = [8 7 6 8 7 9] % Error A([1 2 3]) = [8 7] % Error A([1 2 3]) = [8 7 6] % No error ...

oltre 12 anni fa | 0

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Unexpected result for sin()
In general, you need to make your sample frequency sensitive to the signal frequency... (Nyquist) f = 50; x = 0:0.1/(...

oltre 12 anni fa | 0

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Output of the row of a vector which has the same entry as a second vector
You were close, but you want to switch the order of the arguments to ISMEMBER and use the two output call. % Original data ...

oltre 12 anni fa | 0

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Risposto
Fitting N(N-1) points on an NxN matrix
% Say your given vector is: X = [ 2 3 4 5 6 7 ]; % Now to make the matrix. L = (1 + sqrt(1+4*length(X)))/2; F = ...

oltre 12 anni fa | 0

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Risposto
GUI data sharing problem?
Put the call to UIGETFILE in the callback for the pushbutton. Then immediately after the return, simply use the open the file a...

oltre 12 anni fa | 0

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In plotting Y(x)=10^x, for x=0:5 matlab gives y-axis tick labels as 0 1 2 3 4 and last as 5 x 10^5. How can I get all tick labels as 10^x?
You could use the MATLAB logarithmic plotting routines: x = 0:5; semilogy(x,10.^x) % Also, see SEMILOGX, LOLOG

oltre 12 anni fa | 0