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Nikolaos Zafirakis


21 total contributions since 2019

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Question


interp1 measurements drifting
I have some original data plotted below and I need to interpolate it with my other set of measurements. However whenever I run m...

1 month ago | 1 answer | 0

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answer

Question


Manipulation of multiple cell arrays
I have two questions one to improve my code and the other to perform an operation. I have a series of cell arrays and they are d...

1 month ago | 1 answer | 0

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Putting the result from eval into a cell array
Got the piece of code below. Basically, when I run it I get x_1 all the way to x_600 so i get 600 outputs I would like to put al...

1 month ago | 2 answers | 0

2

answers

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Isolating and running a piece of code separately from the rest
So, I have a piece of simple code below. I want to isolate all the different groups relative to the measurements thus A relative...

1 month ago | 1 answer | 0

1

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Store the values of matrix within a for loop and perform a series of calculations
A = (1:100,1) B = (1:100,1) C = (1:100,1:3) for ind = 1:length(la) Z2(:,:,ind) = [cos(A(ind,:)) 0 -sin(A(ind,:));0 1 0;s...

1 month ago | 1 answer | 0

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Error in a for loop
I’m trying to run a loop through some measurement but I keep getting this error "Unable to perform assignment because the size o...

1 month ago | 1 answer | 0

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Understanding the if command
o = B(1:50,2); a1 = diff(o); [c1,d1] = find(a1>2^15); [e1,f1] = find(a1<-2^15); if c1 > 0; o(c1+1:e1) = o(c1+1:e1)-2^...

1 month ago | 1 answer | 0

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How to Overwrite Data
The main objective is to overwrite the maximum values in matrix B with the values collected in matrix A So I have: A = (1:100,...

2 months ago | 3 answers | 0

3

answers

Question


How to run through many variables at a different set of times continuously?
There are 200 O's and each O lasts 100 minutes, so I need to run the simulation for t=20000 minutes and then every 100 minutes I...

2 months ago | 1 answer | 0

1

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Question


Computing the correct output from an if function
My code keeps showing an error. So the statement X_dot needs to start calculating from the second point in my measurements. so I...

4 months ago | 1 answer | 0

1

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Question


Calculating the difference between a vector and time
I'm looking for a way to get this loop to work, basically I need to calculate the difference in a 3x1 vector divide by the diffe...

4 months ago | 1 answer | 0

1

answer

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How to caculate a value for a step - the previous step
So, I have a value x and i want a piece of code which would allow me to take x_current - x_one_step_previously for example at i...

4 months ago | 2 answers | 0

2

answers

Question


A for loop need help ASAP
I have a loop and I want to collect the output? A are arrays 0:300 for i = 0:3:300 Fi = atan(-(A5(1,1+i)/A5(1,2+i))); Theta ...

4 months ago | 1 answer | 0

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Question


Collecting for loop output
I have a loop and I want to collect the output? A are arrays 0:300 for i = 0:3:300 Fi = atan(-(A5(1,1+i)/A5(1,2+i))); Theta ...

4 months ago | 0 answers | 0

0

answers

Question


for loop collecting output
F is giving me the same measurements and I can’t seem to find how to move to the next position. A = (:,:,1) % There are 100 ...

4 months ago | 1 answer | 0

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answer

Question


Matrix indexing collecting accurate results
I have a for loop and some challenging mathematical equations my goal is to get a 3x3 matrix where A is preferable I would like ...

4 months ago | 1 answer | 0

1

answer

Question


Error using the igrfmagn function (collecting the output)
I can’t seem to collect the values produced by the function igrfmagm. The error produced says ‘Error using cell Too many output ...

4 months ago | 1 answer | 0

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answer

Question


Collecting the outputs of a function within a for loop
I’ve got a function within a for loop and I want to collect the output variables of the function. Currently, the outputs A, B, C...

4 months ago | 1 answer | 0

1

answer

Question


Issues in Matrix multiplication
I have 100 6 by 6 matrices and 100 6 by 1 matrices and I want to multiply them. If I do X=A.*B it does not give me the correct s...

4 months ago | 2 answers | 0

2

answers

Question


Derivative of a vector
I have a vector 3x1 which I multiply by a 3x3 matrix and get a solution (this is all done in a function). I take the resulting 3...

4 months ago | 2 answers | 0

2

answers

Question


set some values to zero in a matrix
Hello, I have a 6x20000 matrix. I would like make the 3 smalest values on each row equal to zero. For example if I have: [ 1, 1...

4 months ago | 1 answer | 0

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