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

8 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');

8 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 ...

8 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 = ...

8 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; ...

8 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...

8 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...

8 years 前 | 0

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

8 years 前 | 0

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

8 years 前 | 1

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

8 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...

9 years 前 | 2

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

9 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)])

9 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...

9 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...

9 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...

9 years 前 | 1

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Searching for math expert! angle of vectors in a loop using law of cosines
See also <http://www.wikihow.com/Find-the-Angle-Between-Two-Vectors> % define sample values x = [1234.77 936.40 681.39...

9 years 前 | 1

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Extract values from matrix/cell in single step
Have a look at <https://de.mathworks.com/matlabcentral/answers/121045-assigning-multiple-outputs-from-a-vector> and <https...

9 years 前 | 1

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how delete all the negative values
x = x(find(x < 0, 1, 'last'):end);

9 years 前 | 0

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How to find even positioned numbers in a vector or matrix.
if size(M,1) > 1 & size(M,2) > 1 res = M(2,2); else res = []; end

9 years 前 | 0

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How to plot x=f(y) ?
Instead of plot(x,y), you plot(y,x) x = linspace(-3,3); plot(x.^3+x.^2-x+6, x), xlabel('y'), ylabel('x')

9 years 前 | 0

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Generating an "all-combinations" matrix for a given vector
x = [2 3 4]; n = prod(x); for i = 1:numel(x) li = []; for ii = 1:x(i), li = [li repmat(ii, [1 n/prod(x(1:i))])]; en...

9 years 前 | 0

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Round each value of matrix
totaircraft = round(totaircraft);

9 years 前 | 0

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what is meant by index exceed matrics dimension?
If you have a 1 x 3 matrix A = [6 7 9] and try to access an element that does not exist, like A(2,3) or A(1, 4), you get ...

9 years 前 | 0

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Change element of a matrix in a row
help imfill

9 years 前 | 0

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Plotting points across the Sine Curve
plot(t, y) hold on ind = find(diff(y>0)<0); plot(t(ind), y(ind), 'ko') ind = find(diff(y>0)>0); plot(t(ind)...

9 years 前 | 0

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How would I check to see if the number of rows in one matrix are equal to the number of rows in another matrix?
You can use assert assert(size(A,1) == size(B, 1), 'Matrices have different numbers of rows.') If the condition given as...

9 years 前 | 0

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Detail lost showing images
900 x 1800 is pretty large. You can check the screen size using get(0,'ScreenSize') If your image fits on the screen...

9 years 前 | 0

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I understand the point of asking a question is to not automatically be given the answer. However I have no clue how to even approach the given questions that are mentioned below. I looked up a way to do it on the Matlab website already but am lost.
function g = grade(num) if num < 60 g = 'E' elseif num < 70 g = 'D' and so on.

9 years 前 | 0

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What font can I use to match my text to greek letters?
In which way are Matlab's default fonts for Greek and other characters not matching? You can change various properties, such...

9 years 前 | 0