MATLAB: Generating a sequence 1,2,3,4,….,n

indexMATLAB

Without using a for loop, how can I generate an index 1,2,3,…,n?

Best Answer

vector=[1:stepsize:n] if the stepsize =1 as in your case, you can disregard it

Related Solutions

MATLAB: Sequence a_n =1/n

Use element-wise division:

n = 1:100;
format short
Seq = 1./n

producing:

Seq =
    1.0000    0.5000    0.3333    0.2500    0.2000    0.1667    0.1429    0.1250    0.1111 ...

alternatively:

format rat
Seq = 1./n

producing:

Seq =
       1              1/2            1/3            1/4            1/5            1/6  ...

EDIT — (17 Jan 2020 at 17:11)

Forgot to include the plot call.

Here it is:

figure
plot(Seq)
grid

This is the same as:

figure
plot((1:numel(Seq)), Seq)
grid

MATLAB: How can enlarge a matrix

If you have MATLAB R2015a (or more recent) then you can use repelem.

Otherwise you could try this FEX submission:

http://de.mathworks.com/matlabcentral/fileexchange/24536-expand

Or else you have to calculate it yourself, the easiest way is to use kron:

>> m = [1,2;3,4];
>> n = 5;
>> kron(m,ones(n))
ans =
     1     1     1     1     1     2     2     2     2     2
     1     1     1     1     1     2     2     2     2     2
     1     1     1     1     1     2     2     2     2     2
     1     1     1     1     1     2     2     2     2     2
     1     1     1     1     1     2     2     2     2     2
     3     3     3     3     3     4     4     4     4     4
     3     3     3     3     3     4     4     4     4     4
     3     3     3     3     3     4     4     4     4     4
     3     3     3     3     3     4     4     4     4     4
     3     3     3     3     3     4     4     4     4     4

Best Answer

Related Solutions

MATLAB: Sequence a_n =1/n

MATLAB: How can enlarge a matrix

Related Question