Replace array elements with another small array using indexing

2 views (last 30 days)
Hi everyone,how to replace array with another small array using indexing
a=[1 1 4 1 3 3 1 1 1 3 4 1 0 0 0 0 0 0 0 0 0];
%replace 1 4 1 with 0 3 0 and 3 4 1 with 2 and b=b(b~=0); to get a new vector
b=[1 3 3 3 1 1 1 2];
Thank you.
  3 Comments
TEJAS PHUTANE
TEJAS PHUTANE on 19 May 2020
I want to do it both ways, replace with 3 or with 0 3 0 and use b=b(b~=0); to get a new array without 0.
TEJAS PHUTANE
TEJAS PHUTANE on 19 May 2020
%my code:
path=[1 1 4 1 3 3 1 1 1 3 4 1 0 0 0 0 0 0 0 0];
p=path;
n=length(p);
for i=1;i=n-3;i=i+1;
if ( p(i)==1 && p(i+1)==4 && p(i+2)==1)
p(i:i+2)= [0 3 0];
end
end
p=p(p~=0);
still not getting desired output

Sign in to comment.

Answers (1)

Matt J
Matt J on 19 May 2020
b=strrep( strrep(a,[1 4 1],3) ,[3 4 1],2)
  2 Comments
TEJAS PHUTANE
TEJAS PHUTANE on 19 May 2020
this actually works but a warning occurs:Inputs must be character vectors, cell arrays of character vectors, or string arrays.
TEJAS PHUTANE
TEJAS PHUTANE on 19 May 2020
if instead of integers i have character vector like
path=["L" "L" "U" "L" "S" "S" "L" "L" "L" "S" "U" "L" "0" "0" "0" "0" "0" "0" "0" "0"];
how can i get shortest path (for line maze) eg: replace L U L with S and S U L with R.
shortpath=["L" "S" "S" "S" "L" "L" "L" "R"];

Sign in to comment.

Categories

Find more on Characters and Strings in Help Center and File Exchange

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!