[Scilab-users] spline and color plot on the chart

[Federico Miyara]

Daniel:

I think you meant to include more than 1 point. You seem to have 
confused the dimensions given by function size.

But anyway this doesn't seem to be what I suggested.

You should compute a spline for vt12 vs x (the right x, using b = c(2)) 
and another one for vv12. You don't need in this case to use lsq_splin, 
but in case you want to use it, the third argument has usually less 
points than the other two, for instance

[yvt, dvt] = lsq_splin (x, vt12, linspace(a, b, 8))

The output argumnts should be used in interp,as shown in the lsq_splin help.

Once you have a smoothed version of vt12_s vs x_s and of vv12_s vs x_s 
you plot vv12_s vs vt12_s

Regards,

Federico Miyara



On 10/04/2020 21:05, Daniel Stringari wrote:
> c = size (vt12)
> a = 0
> b = c (1) // c (1) = 16
> n = c (1)
> x = linspace (a, b, n)
> [y, d] = lsq_splin (vt12, vv12, x ')
> plot (y, d, 'r')
> xlabel ('Speed (rpm)')
> ylabel ('Torque (Nm)')
> title ('Torque x speed values')
>
> //vt12 = 5350.3 5380.19 5410.08 5439.96 4149.5 4179.35 3756.57 3602.73 
> 3568.12 3597.85 3681.91 3711.59 6143.24 6172.86 6202.49 6232.1
> //vv12 = 40.16   39.93   39.71   39.49   69.04   68.54   95.32 119.26 
>   140.49   139.32   155.62   154.37   93.27   92.82   92.38   91.94
>

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