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Date: Tue, 9 Apr 2013 23:03:15 +0530
Subject: retrieving data from a plot in python.
From: Debashish Saha <silideba@gmail.com>
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suppose I have t= [0,7,10,17,23,29,31] f_t= [4,3,11,19,12,9,17] and I have
plotted f_t vs t.

Now from this 7 data points plotting if I want to retrieve 100 data points
and save them in a text file. What do I have to do?

What I am asking is not a fitting of the plot. I know between two points
plot is linear.

What I am asking If I create a array like t=np.arange(0,31,.1) ,then what
is the corresponding array of f_t which agrees well with the previous
plot,i.e,for any t between t=0 to t=7, f_t will be determined by using a
straight line connecting (0,4) and (7,3) and so on.

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<div dir=3D"ltr"><p style=3D"margin:0px 0px 1em;padding:0px;border:0px;font=
-size:14px;vertical-align:baseline;clear:both;word-wrap:break-word;color:rg=
b(0,0,0);font-family:Arial,&#39;Liberation Sans&#39;,&#39;DejaVu Sans&#39;,=
sans-serif;line-height:18px">
suppose I have t=3D [0,7,10,17,23,29,31] f_t=3D [4,3,11,19,12,9,17] and I h=
ave plotted f_t vs t.</p><p style=3D"margin:0px 0px 1em;padding:0px;border:=
0px;font-size:14px;vertical-align:baseline;clear:both;word-wrap:break-word;=
color:rgb(0,0,0);font-family:Arial,&#39;Liberation Sans&#39;,&#39;DejaVu Sa=
ns&#39;,sans-serif;line-height:18px">
Now from this 7 data points plotting if I want to retrieve 100 data points =
and save them in a text file. What do I have to do?</p><p style=3D"margin:0=
px 0px 1em;padding:0px;border:0px;font-size:14px;vertical-align:baseline;cl=
ear:both;word-wrap:break-word;color:rgb(0,0,0);font-family:Arial,&#39;Liber=
ation Sans&#39;,&#39;DejaVu Sans&#39;,sans-serif;line-height:18px">
What I am asking is not a fitting of the plot. I know between two points pl=
ot is linear.</p><p style=3D"margin:0px 0px 1em;padding:0px;border:0px;font=
-size:14px;vertical-align:baseline;clear:both;word-wrap:break-word;color:rg=
b(0,0,0);font-family:Arial,&#39;Liberation Sans&#39;,&#39;DejaVu Sans&#39;,=
sans-serif;line-height:18px">
What I am asking If I create a array like t=3Dnp.arange(0,31,.1) ,then what=
 is the corresponding array of f_t which agrees well with the previous plot=
,i.e,for any t between t=3D0 to t=3D7, f_t will be determined by using a st=
raight line connecting (0,4) and (7,3) and so on.</p>
</div>

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