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random permutation for a matrix
That should be easy i = randperm(5); should give you the permutated indices, so that B = A(:,i); is the permutatio...

11年弱前 | 1

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Replace char with other and count total numbers
What do you exactly mean by "this variable which is depicted above" and where would the \n be? I think tdd4c1 answered to you...

11年弱前 | 0

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Can Matlab read the most recent made file in the default folder?
Hi, you could get the excel files with d= dir('*xls'); and then compare the dates. These are in d(j).date You p...

11年弱前 | 0

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How to plot the function f(x)=x^3 - 4x^2 +1 for x∈[0,25]
You almost got it. Since x is a vector, you should use elementwise operators. not x^2 (what's the square of a vector?) but x.^2...

11年弱前 | 1

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Combination and surface plot
You could try "trisurf". But I agree with John d'Errico that your have too few data. tri=delaunay(cost,consumption); trisu...

11年弱前 | 0

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Is it possible to create a function for display variables with their names on figures?
where do you want that printed? Have you considered using the builtin function "title"? ttl = sprintf('N = %d, dt = %1.4f...

11年弱前 | 0

質問

clean up standard output when running in background
Hi all, I often run matlab in background, by issuing the following command in linux or mac OS (bash) nohup matlab -nodeskt...

11年弱前 | 1 件の回答 | 0

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How to Integrate these data ?
You could use "cumptrapz". For that you'll need to provide both x and y. In this respect, what do you mean "you choose the st...

11年弱前 | 1

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How to plot a Power Spectrum (log log plot) for an image?
I think that's because f and p are matrices. In that case all of its columns are plotted. The lines you see are plot(f(:,1)...

11年弱前 | 0

質問

object properties treated as structures
Hi all, I always thought that you should use get and set to play with object properties. From time to time I stumble on a...

11年弱前 | 1 件の回答 | 0

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axis changes even after "axis equal"
If I understand this correctly, you want an animation with fixed xlim, but you do not want to set the xdata and ydata (I agree w...

11年弱前 | 2

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How can I draw a parity plot?
% scatter plot plot(x,y,'.'); hold % bisector (basically the same as Thorsten) plot([0.5 3],[0.5 3]); % upper and low...

11年弱前 | 0

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Replace char with other and count total numbers
I do not see the relevance of strings or newline chars. What is the object you're showing? What is the result of whos x ...

11年弱前 | 1

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from random number segregation of values?
I think that this should work :) x=rand; y = 2+1.0*(x>0.31)+3.0*(x>=0.6);

11年弱前 | 0

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How to plot point coordinates with connecting lines in between.
that's not matlab syntax. Reading the documentation of "plot" is a good idea here. Type doc plot (enter) Anyway, you should b...

11年弱前 | 0

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Plot and animate a 3D Dice Image
perhaps placing dots (circles) instead of numbers on the faces of the dice is easier, at least for a traditional cubic dice. Tha...

11年弱前 | 0

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How do you get a number string to display the sign (pos and/or neg) in front of it.
Perhaps use sprintf? For instance, if a, b, c are integers ttl = sprintf('f(x) = %+d x^2 %+d x %+d',a,b,c); title(ttl); ...

11年弱前 | 0

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ZERO crossing with certain conditions
I'd go like Y = X-4; c = Y(1:(end-1)).*Y(2:end); Now c(i) should be negative whenever X(i) and X(i+1) are "on different...

11年弱前 | 0

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how to properly transfer plotted figure to a MS Word file?
Have you tried tweaking the export setup? Other things you might want to try are changing the marker size or the PaperSize at...

11年弱前 | 0

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How to convert a 1D solution to 2D using spherical axis symmetry
This is not very clear. What do you mean by "the _solution_ of a 1D problem of the nature y=f(x)"? It seems to me you're plot...

11年弱前 | 0

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Subscript indices must either be real positive integers or logicals.
I guess the line giving grief is x(t) = (F0/m)*(1/wn^2-w^2)*(sin(t.*w)-sin(t.*wn)); x is a vector and t is the subscript ...

11年弱前 | 0

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I need help preallocating array?
Look at the function "zeros". array = zeros(1,5); newArray = zeros(1,5*p); and, in the loop newArray((1+(i-1)*5):(i...

11年弱前 | 0

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How to flip or mirror some vector parts
From the shape of your curve, I guess that you might get roughly the shape you need by setting yd = (y+fliplr(y))/2 wher...

11年弱前 | 0

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Create image axis with the origin in the centre
For the double y axis, see this <http://www.mathworks.com/matlabcentral/answers/98353-how-can-i-show-both-top-and-bottom-or-left...

11年弱前 | 0

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Create an Exponential Function using Taylor Series
Ok John, you want to use a loop instead of using the matrix capabilities of matlab. Imho your code contains both coding [C] a...

11年弱前 | 0

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Using errorbar in MATLAB with asymmetric errorbars
My guess is that momeerr95 contains both the upper and the lower values for the errorbars. Or else, how would matlab know that ...

11年弱前 | 0

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Place one image on a blank image but several times i.e (passport style)
Hi, you can try the command axes('position',p), where p is a vector specifying the position in the figure. You can create a...

11年弱前 | 0

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How to sum multiple matrices?
Product of matrices is "*". Therefore, if they're the same size, D= A*B*C; If instead you want elementwise product, D = A.*B.*C...

11年弱前 | 0

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How to sum multiple matrices?
Hi have you tried the following? D = A+B+C; I'm not sure what you mean with the square parentheses. In matlab square...

11年弱前 | 0

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Problems in accessing 2nd column of matrix
Hi, Your code is very obscure. What exactly do you want do attain? In particular, this line temp = xx(xx(k):xx(k+1)); ...

11年弱前 | 0