expanding matrix with linear line between new samples

hi

lets say i have a 1x20 matrix called A which are samples of a plot

i want to expand A to be 1x50

when i try to make it lets call is matrix B, the samples in the middle are zero and i just want the previous and the next sample to connect (avrage/avrages)

lets say A=[1 2 3 4 5 6 ...

i want a B=[1 0 2 0 3 0 4 ... ===> B=[1 1.5 2 2.5 3 3.5 4]

BUT heres the thing theyre not equally distributed

B=[1 0 0 0 2 0 0 3 ... ===> B=[1 1.25 1.5 1.75 2 2.33 2.66 3 ...

what im asking is how to expand my matrix to be linearly connected between samples

thank you

and sorry for bad english

[Turlough Hughes]

How do you define the number 0's between nonzero values in B?

Answer 1

[Matt J]

B=[1 0 0 0 2 0 0 3];

x=find(B~=0);
xq=1:numel(B);

B=interp1(x,B(x),xq)

B = 1×8

1.0000 1.2500 1.5000 1.7500 2.0000 2.3333 2.6667 3.0000