Answered

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

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

2 years ago | 1

| accepted

Solved

Sum all integers from 1 to 2^n

Given the number x, y must be the summation of all integers from 1 to 2^x. For instance if x=2 then y must be 1+2+3+4=10.

2 years ago

Answered

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)

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)

2 years ago | 0

Answered

how to use LUT form configuring matrix

Use your matrix as index to LUT: Mnew = LUT(M);

how to use LUT form configuring matrix

Use your matrix as index to LUT: Mnew = LUT(M);

3 years ago | 0

Answered

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...

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...

3 years ago | 0

Answered

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...

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...

3 years ago | 0

Answered

Citing MATLAB Optimization Toolbox (BibTex reference)

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

Citing MATLAB Optimization Toolbox (BibTex reference)

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

3 years ago | 2

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Answered

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...

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...

3 years ago | 0

Answered

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...

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...

3 years ago | 0

Answered

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:...

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:...

3 years ago | 0

Answered

How to get the index of maximum value in each row of a matrix?

[~, q] = max(A, [], 2) ; p = (1:size(A, 1))';

How to get the index of maximum value in each row of a matrix?

[~, q] = max(A, [], 2) ; p = (1:size(A, 1))';

3 years ago | 1

Answered

Search specific layer of multidimensional matrix for range of values?

idx2 = ismember(N(:,:,2), dx); idx3 = ismember(N(:,:,3), dx);

Search specific layer of multidimensional matrix for range of values?

idx2 = ismember(N(:,:,2), dx); idx3 = ismember(N(:,:,3), dx);

3 years ago | 0

| accepted

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...

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...

3 years ago | 0

Answered

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 ...

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 ...

3 years ago | 0

Answered

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...

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...

3 years ago | 0

Answered

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)];

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)];

3 years ago | 0

Answered

"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...

"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...

3 years ago | 0

Answered

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...

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...

3 years ago | 0

Answered

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...

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...

3 years ago | 0

| accepted

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);

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);

3 years ago | 0

| accepted

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 = ...

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 = ...

3 years ago | 0

| accepted

Answered

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...

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...

3 years ago | 0

Answered

Problem with using isfield

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

Problem with using isfield

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

3 years ago | 0

Answered

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...

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...

3 years ago | 0

Answered

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.'); ...

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.'); ...

3 years ago | 0

Answered

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)

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)

3 years ago | 0

Answered

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...

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...

3 years ago | 1

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