Function Changem or substitute values of a matrix

조회 수: 22(최근 30일)
MSP
MSP 2018년 5월 18일
댓글: MSP 2018년 5월 19일
Hello!
I am trying to use the function "changem" to substitute values from a matrix..(reference page: https://de.mathworks.com/help/map/ref/changem.html) I am using matlab 2017a but when I use the function, matlab says that the function is undefined.. I cannot find results when I search for it in the DOC.
Does this function still exists? When no, is there a equivalent function? Or does someone knows a possibility to change values of a matrix (is a little bit complex because I want to change the values of the matrix by an equivalent value of a vector).
Thanks in advance, MP

채택된 답변

Guillaume
Guillaume 2018년 5월 18일
편집: Guillaume 2018년 5월 18일
As per sloppydisk's answer, changem requires the mapping toolbox, so clearly you don't have that installed.
I don't have the mapping toolbox either, but reading the function documentation, it seems trivial to implement:
function mapout = my_changem(mapout, newcode, oldcode)
assert(numel(newcode) == numel(oldcode), 'newcode and oldecode must have the same number of elements');
[toreplace, bywhat] = ismember(mapout, oldcode);
mapout(toreplace) = newcode(bywhat(toreplace));
end
  댓글 수: 1
MSP
MSP 2018년 5월 19일
Thanks, works perfectly. After playing around sometime I did to manage it using 2 for loops and using if loops to check the constrains. But thanks again for the answer!

댓글을 달려면 로그인하십시오.

추가 답변(1개)

sloppydisk
sloppydisk 2018년 5월 18일
changem is part of the Mapping toolbox, type
ver
to see which toolboxes you have installed.

Community Treasure Hunt

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

Start Hunting!

Translated by