read data from serial port , change to number and plot it

Question

Truong 2014-5-19

0
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https://ww2.mathworks.cn/matlabcentral/answers/130202-read-data-from-serial-port-change-to-number-and-plot-it

回答： María 2014-5-19

I'm working on a project that uses serial port to receive data, save to a variable so that I can process it later. I used fscanf command to achieve it and receive a large string but not numbers :

x=fscanf(s) %s is serial port name
x=
58514
58954
59386
59799
60207
60683
...
44598
45193
45809
46431 
OK       %1024 elements

I expect an array with 1024 elements but all I get is a very large string with both numbers and characters inside it. My question is whether I can use any command instead of fscanf, or how I can get only numbers (double or integer, not char) from that string. Thanks a lot

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Star Strider 2014-5-19

You posted numbers. What does the array look like that contains both numbers and characters?

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Answer 1

María 2014-5-19

3
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/130202-read-data-from-serial-port-change-to-number-and-plot-it#answer_137430

Try to read the data like this:

x=fgets(s)

It will give you just one line (once you read it, it will give you the following line). Then, you can use the function str2num() to convert the string to a number

y=str2num(x)

I hope this works for you