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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...

7 years 前 | 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 ...

7 years 前 | 0

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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]. ...

7 years 前 | 0

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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...

7 years 前 | 0

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

7 years 前 | 2

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

7 years 前 | 0

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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(...

7 years 前 | 0

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Hi, how can i scale the image data to 0 and 1
Use im2double

7 years 前 | 1

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what are all possibilities for a,b,c to be 72?
a = nchoosek(1:72, 3); idx = prod(a, 2) == 72; a(idx, :)

7 years 前 | 0

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How I connect more legends?
You can use h(1) = plot(... %your first plot h(2) = plot(... % your second plot from another script h(3) = plot(....

7 years 前 | 0

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How to find mean gray level in gray scale image
If you write a script and call it 'meangraylevel.m', that script changes only the variables that you use in the script, but not ...

7 years 前 | 0

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HOW TO USE RANDOM and Cross paired?
K2 = 0.5*rand(100, 1); K2(K2 < 0.25) = 0.25 + K2(K2 < 0.25); iwant = [0.5*ones(100, 1), K2, 0.5 - K2];

7 years 前 | 0

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How can I count the number of times the value of an array/vector/matrix changes value from x to y?
firstvalue = 2; nextvalue = 1; A = A(:); % convert matrix to vector N = nnz(A(1:end - 1) == firstvalue & A(2:end...

7 years 前 | 1

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How to calculate the area enclosed by these 2 curves ?Image attached below....
You can use polyarea to calculate the area of a polygon.

7 years 前 | 0

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imhist in image processing
The number of pixels of this intensity.

7 years 前 | 0

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point coordinate markers of selected points
You don't need find, you can work with logical indices: plot(x(index), y(index), 'or');

7 years 前 | 0

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Bitmap image wrongly inverted
[I, map] = imread('../../Downloads/scene_l.bmp'); imshow(I, map) J = ind2rgb(I, map); % convert to non-indexed image ...

7 years 前 | 1

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How do I use a for loop?
F=randn(3,1)./W; for i = 1:5 Q = inv(A - S*eye(3))*F; F = W./Q; W = Q; end J = (F.*F)./(Q.*F); T = ...

7 years 前 | 1

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Calculating a mean matrix from a large number of matrices
In the for-loop, you can just use if k == 1, M = 1/length(Files)*Data; else M = M + 1/length(Files)*Data; ...

7 years 前 | 0

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count number of shifts in data based on conditions
If x is the vector of your data, you can get the vector of shifts by 1 as dx = diff(x) == 1; And to count the number o...

7 years 前 | 0

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How to mimic the colormap of a RGB image?
I = im2double(imread('../../Downloads/Colormap.png')); % read and convert to double I = I(:,1,:); % we just need each color...

7 years 前 | 0

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How to read and display multiple images in matlab
Try folder='Documents/MATLAB/';

7 years 前 | 0

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Removing the zero that precedes the decimal point
strrep(num2str(a), '0.', '.')

7 years 前 | 1

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filename of function print
medium = 'XYZ'; replica = 'Replica1'; nameCurve = ['growthcurve', medium, ' ', replica]; nameSemlog = ['semilogy grow...

7 years 前 | 1

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c0 and x are scalars, c - vector, and p - scalar. If c is [ ], then p = c0. If c is a scalar, then p = c0 + c*x . Else, p =
function y = mypolyval(c0,c,x) if isempty(c) y = c0; else y = c0 + power(x, 1:numel(c))*c(:); end Th...

8 years 前 | 2

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How to remove duplicates in a specific manner?
B = unique(unique(A, 'rows')', 'rows')'

8 years 前 | 0

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if i want to plot a graph as i have shown in the figure, but at one particular angle without any radius...how should i do it ? l
axis([-1 1 -1 1]), axis equal angle = 30; line([0 cosd(angle)], [0, sind(angle)])

8 years 前 | 0

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how to write this for cycle
You have to use a cell array because your indices have different sizes e = 6:12; for i = 1:numel(e), x{2^e(i)} = 0:1/2^e...

8 years 前 | 0

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Check for existence of nested fields
You can use my function isnestedfield: function yn = isnestedfield(s, fields) %ISNESTEDFIELD True if nested fields are i...

8 years 前 | 2

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How can i create a large colum variable with continious step?
You don't need a loop, you can use Matlab's colon operator to define a range of values first_value:step_size:last_value. You can...

8 years 前 | 1