help with creating certain function for setting elements in one matrix to another

2017 11 4
1 个回答
更新时间：2021 8 20
7 次查看（30 天）

0 个投票

want to make function that takes in text, and then creates a matrix that sets each element to one of the ascii code elements
for example: [abcdef] would get set to [1 2 3 4 5 6]
and [help] would get set to [8 5 12 16]
pls help

回答（1 个）

the cyclist
the cyclist 2017-11-4

0 个投票

Here's one way:
alphabet = 'abcdefghijklmnopqrstuvwxyz';
[~,vec] = ismember('help',alphabet)

9 个评论
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Jessie Ray
Jessie Ray 2017-11-4
what if I want help to represent a vector... so like help could represent a certain a bunch of different letters help = jsdbsfb
how would I get it to convert 'jsdbsfb' and not 'help'
the cyclist
the cyclist 2017-11-4
编辑：the cyclist 2017-11-4
[~,vec] = ismember('jsdbsfb',alphabet)
or
charvec = 'jsdbsfb';
[~,vec] = ismember(charvec,alphabet)
Stephen23
Stephen23 2017-11-4
编辑：Stephen23 2017-11-4
Just define it as a variable, and pass that variable.
str = 'jsdbsfb';
[~,vec] = ismember(str,alphabet)
Note that a simpler way to generate the alphabet is to use the colon, which also reduces the chance of missing a letter:
str = 'jsdbsfb';
[~,vec] = ismember(str,'a':'z')
Jessie Ray
Jessie Ray 2017-11-4
okay yes this would work, but in my project 'jsdbsfb' is actually a random matrix of 300+ letters, so I can't type them into Matlab. I stored them all as one vector called 'text1'
the cyclist
the cyclist 2017-11-4
So, maybe next time give a complete description of your problem first?
Stephen23
Stephen23 2017-11-4
编辑：Stephen23 2017-11-4
"I stored them all as one vector called 'text1'"
Stored where? In some file, in a matrix in MATLAB, or printed on a piece of paper? How did you define this matrix?

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Jessie Ray
Jessie Ray
2017-11-4

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