find probability of number in a matrix
You can sum all elements in each column that matches, and divide by the number of nonzero elements: v = (1:4)'; % your numb...

7 years ago | 0

| accepted

store value after multiple loops
Storing results in a multidimensional array: results = zeros(T, T, T, T); % your code below for n1=1:T x=xi(n1); ...

7 years ago | 0

How do I change a whole row/column to zero in a matrix relating to a 'greater than' condition.
> But is there an easier, more automatic way where I could say if a value in U is greater than 5 then change the corresponding c...

7 years ago | 0

how to request for matlap 2015b version?

7 years ago | 0

| accepted

sum even and odd places values
len = length(A); B = sum(A(mod(1:len, 2)==0)); C = sum(A(mod(1:len, 2)==1));

7 years ago | 0

Index exceeds matrix dimensions.
Did you check what you get for f? f21=@(x)(exp(-x/3))/(4-cos(pi*x)); This returns a scalar, so f will be of size 1*1. If...

7 years ago | 2

| accepted

Get columns from a matrix
m; % this is your 432x90 matrix N = 15; % number of small matrices res(N).small_matrix = []; % init empty nonscalar stru...

7 years ago | 0

| accepted

how to get the specific member data from a struct array?
What c is is what is called a <https://uk.mathworks.com/help/matlab/matlab_prog/access-multiple-elements-of-a-nonscalar-struct-a...

7 years ago | 0

I am trying to plot velocity vectors but they are not getting displayed in a single graph.How can I do that?
hold on % your code here hold off Where 'hold on' will 'Retain current plot when adding new plots' according to the <...

7 years ago | 0

While loop going one too far
Seems like the same problem as <https://uk.mathworks.com/matlabcentral/answers/310334-why-does-this-code-which-is-written-to-cal...

7 years ago | 1

| accepted

Why does this code, which is written to calculate sin(0) to sin(pi), also calculate sin(1.1*pi) even though the while loop should forbid it?
Is there a specific reason why you want to use a while loop? This would be much easier/quicker/easier to read is you vectorise ...

7 years ago | 0

how to get number that occurs maximum number of times in an array of numbers?

7 years ago | 1

Getting a function error "Output argument "z" (and maybe others) not assigned during call"
If y<0, variable z doesn't get any value assigned to it. See the same question <https://uk.mathworks.com/matlabcentral/answer...

7 years ago | 0

| accepted

How to insert elements in a heap
BinMinHeap(n)=ElementsToInsert(n) does not work because of <http://uk.mathworks.com/help/matlab/matlab_prog/access-multiple...

7 years ago | 1

Syntax for solving linear equations
<https://uk.mathworks.com/help/matlab/ref/linsolve.html>

7 years ago | 0

unexpected parenthesis. please i need urgent solution to this
Are you trying to plot plist against ref(count) and ref(count+1)? If that is the case, this would do that: plot(plist,ref(f...

7 years ago | 0

How can I sort a cell array according to one column's order?
There may be a conflict in what you define to be of 'descending order': "if a matrix (in the first column) has the highest ra...

7 years ago | 2

Hi! I need help with a loop!
There is no loop, because k only gets value of t-t/2=t/2 and none of the preceding ones. Changing that to k=1:t would give you t...

7 years ago | 0

Sorting one matrix with another matrix
[A_sorted, idx]=sort(A,1) A_sorted = 2 1 4 3 idx = 1 2 2 1 B(bsxfun(@...

7 years ago | 0

How to show a column of a cell array
Say your cell array is A. A(:,4)=num2cell(cumsum(cell2mat(A(:,3)))) (Cells to numeric, do the math, numeric back to cells...

7 years ago | 0

| accepted

Changing matrix into order pairs
This gives what you described as [[1 2];[1 3];[2 1];[5 6];[1 7];[6 7]]: A=[1 2;1 3; 2 1;5 6;1 7;6 7]; B = mat2cell(A, ones...

7 years ago | 0

Error: Undefined operator '-' for input arguments of type 'cell'.
If you want to preserve the shape of your cell array neural_cue_onset_time, you can convert the cells to the underlying data typ...

7 years ago | 1

Removing duplicate edges?
A graph-driven workaround could be: d = digraph(Gene1,Gene2); m = full(adjacency(d)); g = graph(m|m',d.Nodes); Thi...

7 years ago | 2

How do I add date and time to my exel filename
This produces an 'ugly' filename but it gets through the datetime->char conversion: filename = strcat('Solution_',datestr(d...

7 years ago | 0

Capturing outputs from Loops
To keep track of error1/2 and times, you can maintain an array for each of them: error1 = zeros(91,1); error2 = zeros(91...

7 years ago | 1

| accepted

How do I write a function called mystaff that takes one matrix input argument S, S is a n-by-m matrix from an excel file I have saved. Also the function doesn't return anything
function mystaff(S) end This takes S as input argument and doesn't return anything.

7 years ago | 0

| accepted

Removing duplicate edges?

7 years ago | 0