[Matplotlib-users] [SOLVED] Re: Setting graph to commence at 1 on x-axis

[AG <com...@go...>]

Angus McMorland wrote:
> On 24 February 2010 13:36, AG <com...@go...> wrote:
>   
>> Hi
>>
>> How do I set up my matplotlib.pyplot code so that the data for the
>> x-axis is plotted beginning at 1 not the default 0.  To illustrate:
>>
>> I have a set of time trials and error probability calculations.  Trials
>> are x and scores are y.  At present, the first trial is plotted on the
>> graph at 0 which is illogical.  I admit that I'm not sure exactly what I
>> am looking for, but I can't see this mentioned in the docs.  I just want
>> the plot to begin at trial 1, not the 0; however, I don't mind if the
>> x-axis has a 0 scale on it, but trials don't begin at a 0 trial, so how
>> do I get around this.
>>
>> I've listed the basic code below:
>>
>> plt.plot( scores )
>> plt.ylabel( "Scores" )
>> plt.xlabel( "Trials" )
>> plt.show()
>>     
>
> You can explicitly specify x-axis values:
>
> x = np.arange(len(scores)) + 1
> plt.plot(x, scores)
>
> HTH,
>
> Angus.
>   
Hi Angus

Thanks for the quick reply.  Once I imported numpy as np and re-ran the 
program that did the trick perfectly.

Many thanks!!

All the best

AG