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madhan ravi


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3,910 total contributions since 2018

Communication through MATLAB is always better than arguing.

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Answered
how to plot a unit step function in MATLAB using syms command and create signum function first
<https://www.mathworks.com/help/symbolic/heaviside.html>

31 minutes ago | 0

Answered
strcmp for a part of the world
Use contains()

32 minutes ago | 0

Answered
compressing a code, help me
VetorN = fix( (20 * sqrt(2) .^ (0 : 5) ) ) MD0 = VetorN * 3; MD0(end - 1) = [ ]

1 hour ago | 0

Answered
Plotting in a 3D space
r = num2cell(r); plot3(r{:}, '*')

2 hours ago | 0

Answered
problem with the sum function
norma2 = sqrt(sum(X.^2))

3 hours ago | 0

| accepted

Answered
How to make multiple strings arrays of repeating word and number?
n = 18; "var" + (1:n)

3 hours ago | 0

| accepted

Answered
How do you graph data from a table that is in a cell array ?
TaBlE = table; TaBlE.a = rand(10); plot(TaBlE.a)

3 hours ago | 0

Answered
How to merge two arrays/rearrange two table colums one by one
AB = reshape([A; B], 1, [])

4 hours ago | 1

| accepted

Answered
Month as a two digit number
ix = m < 10 % m is the output of the month(...) , by the way it can be set by Format in datetime(...) M = "" + m M(ix) =...

7 hours ago | 0

Answered
Split a string in this way
strsplit(STRING,'_') %or regexp(STRING, '\_', 'split')

8 hours ago | 0

Answered
Unrecognized function or variable 'length' ???
length(Uu) = len1; % naming a variable length is a terrible idea!!! clear length

8 hours ago | 1

| accepted

Answered
livescript: move to next section
You could select that particular section and press ctrl/cmd + enter to run it.

8 hours ago | 0

Answered
select a subset of images according to the "image name list.txt" that matches a "1" in the "ground truth list.txt"
c = "image name 1.txt" c1 = "ground truth 1.txt" C = c(regexp(c, '\d*', 'match') == regexp(c1, '\d*', 'match'))

10 hours ago | 0

Answered
MATLAB Answers Wish-list #5 (and bug reports)
Pressing ctrl/cmd + k brings up the hyper link dialog box , but why does it make the traget url empty and the display text with ...

10 hours ago | 0

Answered
Concatenate two cell colums with different length, in Variables window it is possible while horzcat gives "not consistent" error.
c = {a, b} %? if this doesn't do what you want , you need to illustrate with an expected result.

10 hours ago | 0

Answered
Matrix with elements as polynomial
ROOTS = cell(numel(X), 1); for k = 1:numel(X) ROOTS{k} = roots(sym2poly(X(k))); end celldisp(ROOTS)

10 hours ago | 2

| accepted

Answered
Solve symbolic equation - answer gives equation, not number
double(sol_x)

10 hours ago | 0

Answered
how to create an array of all permutations
doc randperm

20 hours ago | 0

Answered
How to plot data from a table that is in a cell array?
use *hold on*

22 hours ago | 0

Answered
Invalid indexing or function definition
syms h [1, 5] z = h + 5

1 day ago | 0

Answered
Reducing columns and rows numbers to match a certain matrix.
Find the minimum number of rows and columns and index every matrix until the minimum.

1 day ago | 1

Answered
how to sketch the domain of f(x y)= sqrt(y-x^2)/(1-x^2)
doc fimplicit

1 day ago | 1

| accepted

Answered
Row position and find value
Replace Accelval with [rows, columns] = ... and use the rows to index the table of column 3

2 days ago | 0

| accepted

Answered
Matrix Array Reshaping by fixed columns
reshape(matrix, [], 252)

2 days ago | 0

Answered
How to make two column vectors from cell vector with space delimiter?
S = regexp(C, '\s', 'split'); s = cat(1, S{:}); datE = s(:,1) HouR = s(:,2)

2 days ago | 1

| accepted

Answered
Using value stored in a matrix in a prompt.
doc sprintf

3 days ago | 0

| accepted

Answered
Not able to get count of each elements in array itself
[~, ~, c] = unique(x); v = accumarray(c, 1); Wanted = v(c)

3 days ago | 1

Answered
How to get the real&imaginary mode of the symbolic complex equation
syms A B real Function = A+1j*B rewrite(abs(Function),'sqrt')

3 days ago | 0

| accepted

Answered
Create a vector for each element in another vector to constitute a matrix
[repelem(v, numel(v)), repmat(v, numel(v), 1)] %or [V1, V2] = meshgrid(v,v) [V1(:), V2(:)]

3 days ago | 0

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