Question

Finding the index of spesific element in a matrix?

Lets say we have matrix: a=[ 2, 3, 5 3, 4, 7 4, 4, 4] ; I want to know index of a(4) which is the bold 3. Th...

2 years ago | 2 answers | 0

Question

How to find out whether there is a repetitive element in the columns of a matrix?

example: a=[ 1 2 3 4 2 1 1 4 2] Bold ones are that what I am looking for. There is no need for imformation abou...

2 years ago | 2 answers | 0

Question

Does using cells cause dramatically slow down the code?

Does using cells instead of matrixes make big difference?

2 years ago | 1 answer | 0

Question

Couldn't find what's wrong

a=cell(1,3) a{2}= [2 4 5] for i=1:3 if numel(a{i})==3 b=cellfun(@(q) q==a(i),a,'un',1) end end I trie...

2 years ago | 1 answer | 0

Question

What does 'un' mean here ?

[a1,b,c] = unique(cellfun(@char,a,'un',0)) I read the cellfun page but didn't find anything about this.

2 years ago | 1 answer | 0

Question

How to use 'setdiff' func. on cells

a and b are cells and I want to do this: setdiff(a,b);

2 years ago | 1 answer | 0

Question

Is there a way to start indexing with 0 in MATLAB?

a=[4 2 5 2] can I make this happen? a(0)=4

2 years ago | 2 answers | 0

Question

Why is this not working? And how to fix?

When i run this code, I get an error message about x1. syms x1 x2 c1 c2 c3 eq1= c1-c3==0; eq2= c2-c3==0; eq3= c1+c2+c3==1; ...

2 years ago | 1 answer | 0

Question

How to store vectores which have different lengts? (in a loop)

This doesnt work because every tupple have differents lengths : for i=2:5 ar(i,:)=ones(1,q(i)-q(i-1)+2); end q is a...

2 years ago | 1 answer | 0

Question

How to say this in MATLAB language?

I want to say a plus b equals to 10 math exuation: a+b=10 how write this in matlab?

2 years ago | 1 answer | 0

Question

Pattern search algorithm inMATLAB ?

Can i use this Matlab function: x = patternsearch(fun,x0,A,b,Aeq,beq,lb,ub) to solve something like this:

2 years ago | 0 answers | 0

Question

Where is the zero?

How to find the location of a zero (or a different number) in a vector ? like : a=[ 1 3 5 6 34 4 0 1 3 4 50] =...

2 years ago | 1 answer | 0

Question

How to write a fucntion which we don't know how many "in" values will be needed?

I want to know how to write first line of a function which we cant tell how many variables will be "inputed". example : f...

2 years ago | 1 answer | 0

Question

How to do division on matrices ?

[a b; c d]*[x;y]=[k;l] How can i calculate x and y if I know a,b,c,d and k,l ?

2 years ago | 2 answers | 0

Question

Extracting zeros from vectors

I need to extract zeros from a vector while keeping the same order of elements in s. Like this : S=[1 0 0 2 3 0 0 0 2 1 0...

2 years ago | 2 answers | 0

Question

Could someone explain how this code works?

S=[1 3 0 2 0 0]; C=[0 2]; [~,col] = ismember(C,S); S(col) = []; S = 1 3 0 0 This code i...

2 years ago | 1 answer | 0

Question

How to find if a vector has a repetitive element or not? And its repetition number

For example A=[ 1 3 1 1 2 3 5]

2 years ago | 1 answer | 0

Question

"setdiff" comand usage ?

when i run this code: a=[1 1 2]; b=[1]; setdiff(a,b) i get this: >> c ans = ...

2 years ago | 2 answers | 0

Question

Replacing 2 elements with each other randomly?

Like : a=[2 4 5 242 24] ------> a'=[2 242 5 4 24] my code is : rndm= myset(randperm(length(myset),2)) neighbor...

2 years ago | 1 answer | 0

Question

How to pick randomly elements from a vector without repetation?

If I have a vector like this : a=[1 2 3 4 5] i know how to do this but my vector is something like: a=[23 46 4 2 5] ...

2 years ago | 1 answer | 0

Question

How can i explain this to matlab?

if a is not an empty vector/cluster then do 'this'

2 years ago | 1 answer | 0

Question

Storing vectors in a cluster?

for i=2:10 a=... end I want to store matrixes as an element of a set for every cycle. I know they can be stored i...

2 years ago | 2 answers | 0

Question

How to modify this code for true result?

The objective is to place some boxes into rooms. Each box has its own volume (given in the 'boxes' matrix) and rooms capacities ...

2 years ago | 1 answer | 0

Question

Why i get the out of bound error in this code?

myset=[1 2 3 4 6]; capacity=6; passedall=[] passed=[] for q = 1:5 q=q+1 capacity=6; passedall...

2 years ago | 1 answer | 0

Question

how to create a matrix which is difference (like in sets) of antoher 2 matrix

example: a=[2 3 4] b=[3] How to create matrix C which is: c=[2 4]

2 years ago | 1 answer | 0