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Question about plotting/vectors
When x is a vector you have to use element-wise multiplication and division sigmax=(F/(pi*R))-((4*F*R.*x.^2)./(pi.*K)).*C

7 years 前 | 1

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Resacaling an array to align and plot beside another
x = 1:600; A = rand(1, 600); y = 1:2:600; B = rand(1, 300); plot(x, A, y, B)

7 years 前 | 0

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how to use LUT form configuring matrix
Use your matrix as index to LUT: Mnew = LUT(M);

7 years 前 | 0

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need to gray-rgb transforming
The idea is to convert a color map to an RGB image stripe of size 1 x N, where N is the number of entries in the colormap, and t...

7 years 前 | 0

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How do I check that input is numerical?
Using isnumeric

7 years 前 | 3

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How can I extract all matrix element neighbors ?
You have to ensure that the indices are always valid, i.e., between 1 and the maximum number of rows / columns. For example, wha...

7 years 前 | 0

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Citing MATLAB Optimization Toolbox (BibTex reference)
I would use something like this @misc(MatlabOTB, key = {MATLAB Optimization Toolbox}, title = {MATLAB Optimizatio...

7 years 前 | 4

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How can I repeatedly put a function result into itself, and get a matrix of the results?
N = 500; Y = zeros(1, N); % preallocate for speed Y(1) = myfun(1); for i = 2:N Y(i) = myfun(Y(i-1); end with my...

7 years 前 | 0

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How to add a string to a filename while saving plots
name = 'test'; Either newname = [name, '_angle']; or newname = strcat(name, '_angle'); or, as Stephen...

7 years 前 | 1

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Matching x-axis when two plots's axes are multiple of each other
With the x value of the bar command you can plot the two graphs on top of each other, as you initially intended: x = (0:20:...

7 years 前 | 0

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How to get the index of maximum value in each row of a matrix?
[~, q] = max(A, [], 2) ; p = (1:size(A, 1))';

7 years 前 | 1

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How can I create this simple matrix?
Using unique

7 years 前 | 0

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Search specific layer of multidimensional matrix for range of values?
idx2 = ismember(N(:,:,2), dx); idx3 = ismember(N(:,:,3), dx);

7 years 前 | 0

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How do I change the orientation of a marker randomly?
You have to draw two crossing lines of a random angle. You cannot change the orientation of Matlab's markers. The following f...

7 years 前 | 0

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Why does "find" command fail to find a number in this vector?
You can use find(round(100*v) == 24) The reason that the straight-forward approach does not work is the representation ...

7 years 前 | 0

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How can I change the radius of a circle pointeur
You have to define your own pointer as a 16 x 16 matrix and then change the line in myginput that changes the pointer to use you...

7 years 前 | 0

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How to group arrays in matrix
If the second row is the number of occurrences then you can use [a, ~, c] = unique(A); B = [a, accumarray(c, 1)];

7 years 前 | 0

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"Operands to the || and && operators must be convertible to logical scalar values" occurring with integer comparisons
Check before the while whos E_rec thr n_sv n_sv_max I am quite sure that not all variables have Size 1x1 and Class doub...

7 years 前 | 0

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how to save the output of For loop in a matrix form!
for i = 1:size(sample, 2) s = sample(:, i); % extract only the i'th column! % your code: anom = abs(s - mean...

7 years 前 | 0

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how can I make a plot between theretival and experimental value with the standard deviation?
h(1)= plot(1, 0.351, 'ko') hold on h(2) = errorbar(1, 0.641, -0.4, 0.4, 'Marker', 'x') axis([0.9 1.1 0 1.2]) set(g...

7 years 前 | 0

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How to convert several 2d images into a single 3d image in matlab code?
To concatenate four 2D images of the same size along the 3rd dimension, use: I = cat(3, I1, I2, I2, I4);

7 years 前 | 0

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Plot normal distribution with unknown mean that is normally distributed with known parameters
2 + 8*randn(1, 100) + 4*randn(100,1); or in more detail n = 1; m = 100; % number of samples m1 = 2; s1 = 8; s2 = ...

7 years 前 | 0

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I'm having a divide problem in matrices
P = diag(1./s);

7 years 前 | 0

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Add refline (hline) to the legend
Use handles: hold on h(1) = plot(x1, y1,'--r') h(2) = plot(x2, y2,'r','LineWidth',1.5) h(3) = refline([0 threshlod...

7 years 前 | 0

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Problem with using isfield
if isfield(shape,'leftLung') tmp3 = shape.leftLung{1}; end if isfield(shape, 'rightLung') tmp4 = shape.rightLu...

7 years 前 | 0

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Needing to get the coordinates of the illuminated pixels
You can define a threshold by visual inspection to separate the lit from the unlit pixels to get a binary image. mythreshol...

7 years 前 | 0

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How do I change the iteration variable of the for loop?
It's not possible. Use a while loop instead: j = 1; while j < = a - b plot(Position(1, j), Position(2, j), 'r.'); ...

7 years 前 | 0

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how to convert a noise signal into its hexadecimal format
Help samplevalues = randi(1023, 1, 10); % 10 random values between 0 and 1023 dec2hex(samplevalues, 8)

7 years 前 | 0

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Split Vector based on indices from another vector
You can generate a cell array where the i'th cell is the desired range for the i'th value in y: C = arrayfun(@(yi) x(yi-5:y...

7 years 前 | 1

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How to create a vector of all elements in another vector that meet a certain condition?
A_pos = A(A>0);

7 years 前 | 2