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madhan ravi


Last seen: Today
4 209 total contributions since 2018

Communication through MATLAB is always better than arguing.

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Answered
How parentheses effects multiplication with pi ?
In the first the order of operation is from left to right. In the second the order of operation is inside the parenthesis and...

environ 13 heures ago | 0

Answered
How do I delete my account?
Contact MathWorks Support Team.

1 jour ago | 0

| accepted

Answered
how to label strings in an array with an ID
T = cell2table(StringID(:, 2)); T.Properties.RowNames = StringID(:, 1); Wanted = T{num2cell(tc), :}

1 jour ago | 0

Answered
Error while plotting matrix of complex numbers
plot(real(sub), 'r-', imag(sub) ,'b*');

2 jours ago | 0

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Answered
Variable for loop storage
low = A(lowPs, :)

2 jours ago | 0

Answered
Variable for loop storage
low = cell(numel(lowPs), 1); for k = 1 : numel(lowPs) B = A(:,1) == lowPs(k); %%row numbers in A where A(:,1) that co...

2 jours ago | 0

| accepted

Answered
random matrix with a given number of specified elements
v = [repelem(1, 5), repelem(0, 4)]; Wanted = v(reshape(randperm(numel(v)), 3, []))

2 jours ago | 1

| accepted

Answered
How can I randomize the order of a matrix of images
Filenames = compose('image%d.png', 1:4); Filenames(randperm(numel(Filenames))) % ?

2 jours ago | 0

Answered
Using Surf function with matrix
surf(C)

3 jours ago | 0

Answered
Plotting in 3d
doc fsurf

4 jours ago | 0

Answered
wrong differential equation solution
a1 = matlabFunction(simplify(sol)); a = matlabFunction((1/80)*(36*exp(-t)-35*cos(t)-cos(3*t)+125*sin(t)-3*sin(3*t))); t ...

4 jours ago | 1

Answered
Livescript: equation number
No, the workaround would be to use section titles.

4 jours ago | 0

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Answered
Why does the second matrix start with zeros?
MATLAB assigns zero to the previous indices, for better understanding: clear a a(11) = 1; % now you will see elements fro...

4 jours ago | 1

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Answered
How to remove array items that include a certain substring?
v = regexprep(filetable, '^[a,b].*', ''); v(cellfun('isempty', v)) = []

5 jours ago | 0

Answered
Problem about rounding to 0
w = u_1 * u_2 - u_3 * sym(u_4) Click on the tag floating-point.

6 jours ago | 1

Answered
How can I get maximum and minimum value with sym variables
Use matlabFunction() and fminbnd() to find the minimum value of that function and to find the maximum extreme use negative sign ...

6 jours ago | 0

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Answered
Sorting a matrix using it's index
Asort2 = A(sub2ind(size(A), repmat((1:size(A,1)).', 1, size(A,2)), idA))

6 jours ago | 0

Answered
How to reshape matrix 2 columns by 2 columns
First = matrix(:, 1:2:end); Second = matrix(:, 2:2:end); Wanted = [First(:), Second(:)]

6 jours ago | 0

Answered
SUBS function not working properly - R2020a
double(val) %or vpa(val)

6 jours ago | 0

| accepted

Answered
Inserting a row in a matrix in a precise place
z = sortrows([A; b], 1); [b_logical, b_where] = ismember(b, z, 'rows')

6 jours ago | 1

Answered
Extract variable rows and columns from a matrix
A(sub2ind([nr, nc], rows, 1:nc))

7 jours ago | 0

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Answered
How to make a NaN vector if there is a single NaN in a column?
[m, n] = size(A); A = nan(m, any(isnan(A(:))) * n)

7 jours ago | 1

| accepted

Answered
How to assign values to an array with broadcasting
Your way of using repmat() is the easiest way.

7 jours ago | 0

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Answered
Error using 'Save' including quotation marks around variables
Use writematrix() or dlmwrite() or csvwrite() for older versions bearing in mind that filename = 'sample'; % for example

7 jours ago | 0

Answered
Find out how long after division will be an integer?
Simple use *mod()* doc mod

8 jours ago | 0

Answered
How can one create frequency table of two dimensional data?
[u, ~, c] = unique(data, 'rows', 'stable'); Wanted = [u, accumarray(c, 1)]

8 jours ago | 0

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Answered
how to skip plot in the legend when the number of plots is variable
<https://www.mathworks.com/help/matlab/ref/legend.html#bu_sz6u-1>

8 jours ago | 0

Answered
fft Invalid expression in plot
plot(t, f)

8 jours ago | 0

| accepted

Answered
How to pad cell w/ multiple arrays with zeros
M = max(cellfun(@length, myCell)); Wanted = cellfun(@(x) [x; zeros(M - numel(x), 1)], myCell, 'un', 0)

8 jours ago | 0

| accepted

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