Re: How to Store Data Detected by Octave

[Ron . Simonson]

On 03/08/2017 03:29 PM, GuiCintraAlves wrote:
> I'm using a barometer in an arduino where it gives me 4 variables.
> I can read in the octave using the code:
>
> clear;
> pkg load instrument-control
>   s1 = serial("/dev/ttyACM0",9600 );
> data = srl_read(s1,3000);
> s1 = char(data)
> ...........................................
> Temperatura = 26.90 *C
> Pressao = 94474 Pa
> Altitude = 585.79 metros
> Altitude real = 600.34 metros
>
> And... i need plot it. How i can store  and plot??
>
>
>
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My preference is to separate data collection, and data plotting.  I 
would probably do something
like the following:

[t, p, a, ar] = sscanf(s1, "Temperatura = %f *C\nPressao = %f 
Pa\nAltitude = %f metros\nAltitude
 real = %f metros", "C");

outfile = "mydata.dat";
fpwrite = fopen(outfile, "w");
fprintf(fpwrite, "%#5.2f  %#6d  %#6.2f  %#6.2f\n",
                 t, p, a, ar);
printf("%#5.2f  %#6d  %#6.2f  %#6.2f\n",
                 t, p, a, ar);
fflush(fpwrite);
fclose(fpwrite);

and then, use gnuplot for plotting as shown in the attached plt file.

Hope this helps to get you started.

Ron.

datascan.plt
Description: Text document