How to separate string data and convert it to number?

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Setiawan Putra Hendratno
评论： Vandana Rajan 2017-3-1
I have a problem to separate this data BE1234U1234 which B is the begin of counting real time count for sensor, i.e. encoder motor and ultrasonic distance, E for encoder, and U for ultrasonic distance.
I'm using Altera to acquired data and read it to MATLAB. But I can only separate the data from B1234E for encoder only. How can I read and separate the data into 1234 for encoder and 1234 for ultasonic distance respectively?
Thank You,
Setiawan

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回答（2 个）

Stephen23
Stephen23 2017-2-28
编辑：Stephen23 2017-2-28
>> str = 'BE1234U1234';
>> sscanf(str,'BE%dU%d')
ans =
1234
1234
for example:
>> str = 'BE1234U5678';
>> vec = sscanf(str,'BE%dU%d');
>> enc = vec(1)
enc = 1234
>> ult = vec(2)
ult = 5678
Vandana Rajan
Vandana Rajan 2017-2-28
Hi,
' ismember ' function can help you here.
>> [e_val, e_pos] = ismember('E',c);
>> [u_val, u_pos] = ismember('U',c);
>> enc_val = c(e_pos+1:u_pos-1)
enc_val =
1234
>> ultra_val = c(u_pos+1:end)
ultra_val =
1234
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Setiawan Putra Hendratno
Setiawan Putra Hendratno 2017-2-28
At least I can separate the data. Thank you. I'll try it in my supervisor's lab.
Vandana Rajan
Vandana Rajan 2017-3-1
@Stephen Cobeldick,
Yeah. I missed that part. Thanks for mentioning that :)

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