Thread: [Matplotlib-users] plotfile: would like to certain number of rows...how do I do that?

i would only like to plot a certain number of rows...say 50 - 100...how do i
do that?

Thanks everyone for your help :)
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On Sat, Jan 10, 2009 at 12:50 PM, helstreak <hel...@ho...> wrote:
>
> i would only like to plot a certain number of rows...say 50 - 100...how do i
> do that?
>
> Thanks everyone for your help :)

plotfile does not support row limits, but you could simply load the
data and then plot it, slicing it however you'd like.

  import numpy as np
  import matplotlib.pyplot as plt
  x = np.loadtxt('myfile.dat')
  plt.plot(x[50:100])

Does gnuplot support row ranges in plotfile? I could easily add
them....  I am not a plotfile user so I don't know what people find
useful there, but limiting the row ranges makes some sense.  If I make
the changes, I'd like to make them maximally gnuplot compatible since
this was te inspiration for plotfile.


JDH

not sure if it does, but if you added it to matplotlib then i guess you would
have a one up on gnuplot...


John Hunter-4 wrote:
> 
> On Sat, Jan 10, 2009 at 12:50 PM, helstreak <hel...@ho...> wrote:
>>
>> i would only like to plot a certain number of rows...say 50 - 100...how
>> do i
>> do that?
>>
>> Thanks everyone for your help :)
> 
> plotfile does not support row limits, but you could simply load the
> data and then plot it, slicing it however you'd like.
> 
>   import numpy as np
>   import matplotlib.pyplot as plt
>   x = np.loadtxt('myfile.dat')
>   plt.plot(x[50:100])
> 
> Does gnuplot support row ranges in plotfile? I could easily add
> them....  I am not a plotfile user so I don't know what people find
> useful there, but limiting the row ranges makes some sense.  If I make
> the changes, I'd like to make them maximally gnuplot compatible since
> this was te inspiration for plotfile.
> 
> 
> JDH
> 
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