How to assign specific value for character
조회 수: 4 (최근 30일)
이전 댓글 표시
I have a cell array of character vectors, let say
A = {'r' 'b' 'g'; 'g' 'r' 'b'; 'b' 'r' 'g'}
how do I change this character to a specific value, eg: r = 0.5, b = 2, g = -3?
댓글 수: 0
답변 (2개)
Jos (10584)
2017년 5월 21일
Here is an easy way:
A = {'r' 'b' 'g'; 'g' 'r' 'b'; 'b' 'r' 'g'}
RGBval = [0.5 2 -3]
[~,loc] = ismember(A,{'r','g','b'})
B = RGBval(loc)
댓글 수: 1
Walter Roberson
2017년 5월 21일
RGBval('rgb') = [0.5 2 -3];
A = {'r' 'b' 'g'; 'g' 'r' 'b'; 'b' 'r' 'g'};
B = cellfun(@(C) RGBval(C), A);
댓글 수: 2
Walter Roberson
2017년 5월 22일
RGBval('rgb') is the same as RGBval(['r', 'g', 'b']) which is the same as RGBval([double('r'), double('g'), double('b')] which is the same as RGBval([114, 103, 98]). Characters, except for char(0), can be used as indices for arrays, and a vector of characters is transformed using double() to become a vector of indices.
There is no requirement that you use the minimum-memory data structure for operations if you have enough available memory.
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!