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

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Jessie Ray 2017-11-4

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关闭： MATLAB Answer Bot 2021-8-20

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

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the cyclist 2017-11-4

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在 MATLAB Online 中打开

Here's one way:

alphabet = 'abcdefghijklmnopqrstuvwxyz';
[~,vec] = ismember('help',alphabet)

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Andrei Bobrov 2017-11-4

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在 MATLAB Online 中打开

discretize('help'-'a',('a':'z') - 'a')

Jessie Ray 2017-11-4

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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'

Jessie Ray 2017-11-4

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that didn't work for me. any other ideas?

the cyclist 2017-11-4

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编辑：the cyclist 2017-11-4

在 MATLAB Online 中打开

[~,vec] = ismember('jsdbsfb',alphabet)

charvec = 'jsdbsfb';
[~,vec] = ismember(charvec,alphabet)

Stephen23 2017-11-4

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编辑：Stephen23 2017-11-4

在 MATLAB Online 中打开

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 2017-11-4

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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 2017-11-4

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So, maybe next time give a complete description of your problem first?

Stephen23 2017-11-4

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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?

Jessie Ray 2017-11-4

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lol sry

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

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