Answered
How to turn 64x1 matrix into an 8x8 matrix?
y = reshape(X,8,8)

6 years ago | 1

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Answered
"Argument to dynamic structure reference must evaluate to a valid field name" error please code also been attached????? and also i cannot execute it.
You need to change those lines Vx = K.(sin(thetaInDegrees1)-sin(thetaInDegrees2)*cos(thetaInDegrees3)); Vy = K.(-sin(thetaInDe...

6 years ago | 0

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Answered
Increment Nonce by any fixed value in loop
Using a loop: nonce = {'00' '11' '22' '33' '44' '55'}; x = '01'; for i = 1:numel(nonce) nonce{i} = dec2hex(hex2dec(nonce...

6 years ago | 0

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Answered
Solve for array of values for cos and sin functions returning [0x1 sym]
One way: syms x y c a = x^2 + c - y == 3; % function a is overwritten in the next line! a = x^2 + sin(c*pi/180) - y == 3; %c ...

6 years ago | 1

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Answered
How to randomly and uniquely select 2000 samples from an array with 1x460800.
Being A your array and N the number of random samples you want: B = A(randperm(numel(A),N));

6 years ago | 1

Answered
How to convert a one column vector to a matrix with N number of rows and M number of colunms
Let A your row vector, then: res = reshape(A,[],168)';

6 years ago | 0

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Answered
Combinations of different rows of a matrix
A = rand(90,2); %Example b = nchoosek(1:size(A,1),2); res = reshape(cell2mat(arrayfun(@(i) A(b(i,:),:),1:size(b,1),'uni',0))...

6 years ago | 0

Answered
index out of bounds because numel(dt)=2016
In this loop: for I=1:N if dt((2*I-1)/2*Num_Unit)<0.25 c(I)=1; else c(I)=0; end end %where ...

6 years ago | 0

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Answered
Use isnan with input excel data containing a combination of strings and empty cells in a row
If you just want the text: [num, str, raw] = xlsread(INFILE) samplerow = str(1,:); samplerow(cellfun(@isempty,samplerow)) = [...

6 years ago | 0

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Answered
Changing two variables in a for loop
Try this: B = zeros(size(A,1),4*size(A,2)); B(:,1:4:end) = A;

6 years ago | 0

Answered
Replication factors must be a row vector of integers or integer scalars.
c must be an integer. Then, a solution: depth = [0.01 1.5:1.5:30]'; w = 10 - 0.5 .* depth; w(w<0) = 0; a=829862; b=21 c=ro...

6 years ago | 0

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Answered
second largest peak value
To obtain the coordinates of the second peak you just need: [PkAmp, PkTime] = findpeaks(abs(hilbert(signal(1,:))),t); [~,idx]...

6 years ago | 1

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Answered
Deleting every row with a zero in the first column, except the first row
Try this: A([false;~A(2:end,1)],:) = []

6 years ago | 0

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Answered
How to make matlab count
A =[1 2 3 4 5 1 2 3 5 6 7 2 4 3 5]; x=input('Number') sum(A(:) == x)

6 years ago | 1

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how can we perform 6x6 matrix without values to find the inverse and determination
If you have the symbolic toolbox, you can do something like this: syms a11 a12 a21 a22 x = [a11,a12;a21,a22]; det(x) a...

6 years ago | 0

Answered
Different matrix multiplication results from the sparse and full version of the same matrix
That is the floating point error (it is not related with sparse or full matrix). See this: clearvars v1 = [0 0 1 0 1 3;0 0 0 0...

6 years ago | 0

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Answered
Is var command works also for complex numbers?
If you take a look at the var documentation https://es.mathworks.com/help/matlab/ref/var.html you can see that the definition is...

6 years ago | 1

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Answered
Index in position 1 is invalid. Array indices must be positive integers or logical values. Error in pid_optimized1 (line 17) solution(K,:) = [K a m ts];
You are using K as a logical indexer, but K take non positive integers values, throwing, then, an error. I gues that the solutio...

6 years ago | 0

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Answered
How to find the complex root for this equations
First, one important suggestion: Don't call your function as one Matlab function (roots, in fact is the one that you need to cal...

6 years ago | 2

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Answered
Function to find max value from function cell array
I see to possible answers depending on what you want: If you want to obtain the maximum value (for the three functions) for eac...

6 years ago | 0

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Answered
How to calculate total distance traveled from position vs time experimental data
Following your image, you have a position array like: position = [10,10,0,0,-16,-16,0,14]; Then to calculate the total distanc...

6 years ago | 1

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Answered
Conditional statement in a for/if loop
Try this: res = RDSM; res(LBOS > RBOS) = LDSM(LBOS > RBOS); T2 = table(frame,res);

6 years ago | 0

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Answered
Cell array for legend in a plot loop
Putting the legend call out of the loop: % Get field names as a cell array names = fieldnames(Struct); % Declare the cell ar...

6 years ago | 0

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Answered
How do I add a column to a cell array based on existing values in another column?
One option is: x(:,3) = deal({0}); x(ismember(x(:,2),'A'),3) = deal({1});

6 years ago | 1

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Answered
could anyone help me how to randomly select the values.
Try this: res = b(randi(numel(b),1,5))';

6 years ago | 0

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Answered
Simple if statement always gives 0
You need to put && between two comparisons as: function f = W(t) if 0 <= t && t < (3/12) f = 0; end if ...

6 years ago | 0

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Answered
How to plot sine graph by using for loop?
You don't need a loop, just: theta = 0:0.1:2*pi; plot(theta,sin(theta))

6 years ago | 1

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Answered
Result producing 1x5 array instead of 10x5?
You need to specify the index: n = 10; result = zeros(n,5); for k=1:n; A0=1;P0=29;g=rand;p=rand;B=rand; result(k,:) = [A0,P...

6 years ago | 1

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Answered
Given a matrix "A", how to create a row vector of 1s that has the same number of elements as "A" has rows?
I think the goal of this forum is not to do anyone's homework, but to solve generic questions about Matlab that can help more us...

6 years ago | 7

Answered
Not enough input arguments?
In this line: broyden(x,F,7,0.001); you are calling the function F without inputs!

6 years ago | 0