[scilab-Users] drawing out of two data files

[Antoine Monmayrant]

Le 20/09/2010 14:41, Peng Du a écrit :
> Thanks for your replies. They are definitely useful but I think it 
> would be better to make my problem clearer:
>
> Different to the example Antoine provided, my data looks more like
> data1=[1,5,76,2,7,32,54,6,343,675,454,32,121,5,6,8,]
> data2=[3,12,43,54,65,76]
Do the following:

t1=linspace(0,1,length(data1));
t2=linspace(0,1,length(data2));
plot(t1, data1,"rx");
plot(t2,data2,"k+");

Antoine

>
> They are the data collected from an experiment and unlikely to have 
> any mathematical relationship. The first and last value happen at the 
> same moment ("1" in data1 and "3" in data2 happens simultaneously). 
> The difference in the sizes of data1 and data2 is due to the different 
> sampling rate when collecting data.
>
> What I'd like to do is something like "plot(t,data1); plot(t,data2)" 
> where t denotes the timespan. So that in the graph the "1" in data1 
> and "3" in data2 are aligned to the identical x-axis position (time) 
> whilst "8" in data1 and "75" in data2 are also aligned. And everything 
> else in between should be averagely distributed.
>
> So how can I get it done?
>
> Thanks very much.
>
> On 20 September 2010 13:08, Francis Drossaert 
> <Francis.Drossaert at pgs.com <mailto:Francis.Drossaert at pgs.com>> wrote:
>
>     Just use plot(x,y) or plot2d(,xy) rather than just plot(y) or
>     plot2d(y). Scilab will plot irregular sampled data correctly.
>
>     For example this will plot a straight line even it irregular sampled:
>
>     x = [0,1,2,3,4,4.5,5,5.5,6];
>
>     y = [1,2,3,4,5,5.5,6,6.5];
>
>     plot(x,y);
>
>     *From:* Peng Du [mailto:eddy.pdu at gmail.com
>     <mailto:eddy.pdu at gmail.com>]
>     *Sent:* 20 September 2010 12:49
>     *To:* users at lists.scilab.org <mailto:users at lists.scilab.org>
>     *Subject:* [scilab-Users] drawing out of two data files
>
>     Hi everyone.
>
>     I have two data files containing information of the event with the
>     same timespan but in different sampling rate, i.e. they have
>     different sizes but the first and last line denote the identical
>     moment.
>
>     Is there any way I can draw them in one graph and have them proper
>     aligned? Thanks a lot.
>
>     Best regards,
>
>     Peng
>
>
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  Antoine Monmayrant LAAS - CNRS
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