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Ahmad Hasnain
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Modifying a matrix such that each entry can be written in a block of four
Hi, I have a matrix, say A = [1 2 3 4]; I want to modify it in such a way that it can be written as A = [1 1 2 2 ...
fast 3 Jahre vor | 2 Antworten | 1
2
AntwortenFrage
How to find x and y coordinates in a black and white image?
I have a black and white image. I want to find the coordinates of the outline of the black blob. I want these coordinates so tha...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to save indices of a certain region of a matrix
I have a matrix, let's say A A = [1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16]; I have another matrix, let's say B B = A(3:end,...
mehr als 4 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Reading data from cell array
I have a cell array that contains all the data. A{1,1}, A{2,1},...A{37,1}. Now, I want to extract the first row from A{1,1}, A{...
mehr als 5 Jahre vor | 1 Antwort | 0
1
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Reading data from csv files
I have 37 csv files. I need to read data from first row of all the 37 files and merge these 37 rows into one mat file. Then I w...
mehr als 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Merging multiple csv files into one mat file
I have multiple csv files (37 files). Every csv file has a column and it want to merge it into one mat file so that I get a mat ...
mehr als 5 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Creating a Sparse Matrix
I have a big matrix B and I get it by concatenating the small matrices. B = [A1 M1 M2 Z1 M1' M2' Z2 A2]; But w...
mehr als 5 Jahre vor | 0 Antworten | 0
0
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I want to change value of a variable after every 10 iterations
I am doing 100 iterations. I have a variable gamma that multiplies with a vector a. I want to update the value of gamma after ev...
mehr als 5 Jahre vor | 1 Antwort | 1
1
AntwortFrage
How to half the value of a constant inside an iteration?
I have an iteration loop. Inside the loop, I have a constant gamma. I want its starting value to be 10e-8. I want to half its va...
mehr als 5 Jahre vor | 1 Antwort | 0
1
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Putting column vector in a matrix
for i = 1:N for row = 1 : n for col = 1:m grad(row,col)= .... %%%% I get a n x m matrix %%%% ...
mehr als 5 Jahre vor | 1 Antwort | 0
1
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How to add columns to form a matrix?
I am calculating a column vector in a FOR loop. I get N columns and I want to put them in a matrix. for i = 1: N dc(i) = ....
mehr als 5 Jahre vor | 3 Antworten | 0
3
AntwortenHow to multiply arrays in struct file with a variable?
Thanks. The answer was very helpful.
fast 6 Jahre vor | 0
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How to multiply arrays in struct file with a variable?
I have four variables that are known to me, i.e. 'high', 'low' and 'a' and 'b'. I have a mat file, which contains a lot of array...
fast 6 Jahre vor | 2 Antworten | 0
2
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How to compare a number with values of a vector?
I have a vector. For example A = [20 40 60 80 100 120] I have a number as an input in a function function imp(omega...
fast 6 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to compare a number with all the values of a vector?
*I have the following function: * function Z = imp (alpha) *% alpha is a scalar* A = [10 20 30 40 50 60 70] ...
fast 6 Jahre vor | 2 Antworten | 0
2
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How to create array with unequal spacing?
I want to create an array with unequal spacing. I have h = 1 1/2 1/4 1/8 ..... 2^-60. Every second entry in this array is 1/2...
mehr als 6 Jahre vor | 1 Antwort | 0
1
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Calling a function with vector as input
I have a function: function [U] = FE (nelx, nely, o) As nelx=4, nely=4 and o=2 I could simply call it by writing FE(4,4,2). ...
mehr als 6 Jahre vor | 0 Antworten | 0