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madhan ravi


Last seen: Today
4.218 total contributions since 2018

Communication through MATLAB is always better than arguing.

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Answered
How to convert a char into double?
sscanf(f,'%d')

alrededor de 8 horas ago | 0

Answered
lines through markers on legend
x = -10 : 0.1 : 10; y = cos(x); plot(x, y, '--o', 'MarkerSize', 5) hold on y = sin(x) plot(x, y, '--d', 'MarkerSize',...

alrededor de 11 horas ago | 1

Answered
How to create function handle with matrix inputs, vector output?
FCN = @(x) x(:, 1) + x(:, 2); sum(in, 2) % ??

1 día ago | 0

| accepted

Answered
"str2sym" delete the element wise operation
doc matlabFunction

1 día ago | 1

| accepted

Answered
How to replace multiple elemets at particular index in vector ?
a(3 : 2 : 7) = [.7, .1, .9]

1 día ago | 1

| accepted

Answered
extract num and den from matrix transfer function
Use it inside the loops, preallocation is recommended for the variables.

1 día ago | 0

Answered
How can i get the last element of a maxium with the help of findpeaks?
<https://www.mathworks.com/help/signal/ref/findpeaks.html#bufhxsk-2> It states: _“For the flat peak, the function returns ...

1 día ago | 0

| accepted

Answered
Error 'Array indices must be positive integers or logical values.' when the number of indices is large
In this case it’s probable that b has elements less than 1 and greater than 32. Outside_bounds = nnz((b < 1) | (b > 32)) % t...

3 días ago | 0

| accepted

Answered
fzero or fplot function
The anonymous function should perform element wise operations (warnings for fplot) and (errors for fzero).

3 días ago | 0

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...

3 días ago | 0

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

4 días 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), :}

4 días ago | 0

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

4 días ago | 0

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

4 días 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...

4 días 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, []))

5 días 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))) % ?

5 días ago | 0

Answered
Using Surf function with matrix
surf(C)

6 días ago | 0

Answered
Plotting in 3d
doc fsurf

7 días 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 ...

7 días ago | 1

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

7 días ago | 0

| accepted

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...

7 días ago | 1

| accepted

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

8 días ago | 0

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

8 días 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 ...

8 días ago | 0

| accepted

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

8 días 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(:)]

8 días ago | 0

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

9 días 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')

9 días ago | 1

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

10 días ago | 0

| accepted

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