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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...

8 years ago | 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...

8 years ago | 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:...

8 years ago | 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))';

8 years ago | 1

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How can I create this simple matrix?
Using unique

8 years ago | 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);

8 years ago | 0

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Answered
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...

8 years ago | 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 ...

8 years ago | 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...

8 years ago | 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)];

8 years ago | 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...

8 years ago | 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...

8 years ago | 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...

8 years ago | 0

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Answered
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);

8 years ago | 0

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Answered
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 = ...

8 years ago | 0

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

8 years ago | 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...

8 years ago | 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...

8 years ago | 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...

8 years ago | 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.'); ...

8 years ago | 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)

8 years ago | 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...

8 years ago | 1

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

8 years ago | 2

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Finding row indexes in array
idx = cellfun(@(x) any(ismember(a, x)), b, 'UniformOutput', false); rows = cellfun(@(x) a(:, x), idx, 'UniformOutput', fals...

8 years ago | 0

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How to write a code for iteration?
After the first box, you write deltaT = epsilon + 1; % so that the while loop is entered while deltaT >= epsilon ...

8 years ago | 0

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Answered
What does this vector assignment mean?
That's easy: randi([1,6],1,diceLeft) generates a 1 x diceLeft matrix of random integer values from the interval [1,6]. ...

8 years ago | 0

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Answered
generate a matrix from some vectors
% sample values n = 10; a = rand(1, n); LB = 1:n; UB = LB + 1; A = repmat(a, [2*n , 1]); idx = 1:2*n+2:2*n...

8 years ago | 0

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Answered
How to descend order column that have maximum values zero in MATLAB
[~, idx] = sort(sum(A == 0), 'descend')

8 years ago | 2

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Detecting colour of a specific x and y coordinate of an image
col = I(x, y, :);

8 years ago | 0

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Answered
How to add smaller matrix into bigger matrix? (Tetris based idea)
To add, for example, block 3 with the upper left corner at row i, column j: b = block{3}; tetris(i:i+size(b,1)-1, j:j+size(...

8 years ago | 0

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