Re: Plotting a graph out of different data sets that consist of numbers and labels

[Nicholas Jankowski]

On Nov 29, 2015 11:34 AM, "Dave Cottingham" <address@hidden> wrote:
>
>  
>>
>> ---------- Forwarded message ----------
>> From: Jonathan Camilleri <address@hidden>
>> To: Help GNU Octave <address@hidden>
>> Cc: 
>> Date: Sun, 29 Nov 2015 17:10:16 +0100
>> Subject: Plotting a graph out of different data sets that consist of numbers and labels
>> I am trying to plot a graph which makes sense to me, which is difficult to crunch in a single function, but let's say I want to see numeric data and labels as legends of this data to start with and then according to my professor I have to use different techniques to make the machine learn something new from the data, which is the tougher part.
>>
>> The problem with my simplistic code is that I have no way of telling Octave that iris_data_1 and labels are just different columns of a single matrix that consists of different data types, so I had to tinker using a spreadsheet solution a process that I would have to automate later.
>>
>> I was reading the cookbook at http://wiki.octave.org/Cookbook, and, I am no Jamie Olivier yet, unfortunately.
>>
>> I ran:
>> addpath('...')
>> load('iris-data-1.dat')
>> load('iris-data-label.dat')
>> plot(...) //this is the part that is tough, because I do not know how to link the data so that the iris-data-label.dat file appears as a legend on the y axis.
>> plot(mean(íris-data) 
>>
>> //this seems to work, I am not sure how to measure the accuracy though.
>>
>> --
>> Jonathan Camilleri
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>
> You might find this helpful:
>
> http://octave.1599824.n4.nabble.com/Changing-tick-text-on-axis-td1632006.html
>
>  - Dave Cottingham
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I can't view your data files at the moment, but the legend command will create a legend using whatever text you specify, in that order on the currently active plot.

legend('label1', 'label2',...)

If you read in the names from the file, you can pass the strings to the function. I'm not sure how your load command would bring them in by default. A cell array would be useful and easy to pass right to the legend function.

Nick j