[R] Differentiate values in a plot by colour or symbol

[Ismail SEZEN]

> On 30 May 2017, at 21:23, Tobias Christoph <s3tochri at uni-bayreuth.de> wrote:
> 
> Ahh, okay.
> 
> I think now I understand what you exactly mean. But the plot is stil not working /differentiate the dots by color. I used the following formula.
> "plot(data$stations, data$revenue, xlab="stations", ylab="revenue", col = findInterval(data$year, c(2005, 2010, 2015))"
> 
> I think the problem is stil related to the term "col = findInterval(data$year, c(2005, 2010, 2015))" and its notation.
> 
> Just to make sure: "data" is the name of the data-table imported in R. "year" is the lable of the column where the years are listed in the data-table?
> 
Exactly. Make sure all the columns in data.frame are numeric. Also I don’t know the range of years. You should arrange arguments to findInterval according your data. If you would send a minimal example as stated in posting guide [1], you will have your answer in second email :).

1- http://www.R-project.org/posting-guide.html <http://www.r-project.org/posting-guide.html>

> Cheers
> 
> 
> 
> Am 30.05.2017 um 19:57 schrieb Ismail SEZEN:
>> 
>>> On 30 May 2017, at 20:48, Tobias Christoph <s3tochri at uni-bayreuth.de <mailto:s3tochri at uni-bayreuth.de>> wrote:
>>> 
>>> Hi Ismael,
>>> 
>>> thanks for your quick reply.
>>> 
>>> I was now able to esmitate two intervals with the "findInterval"-Function.
>>> 
>>>   x  
>>>  [1,] 2005 1
>>>  [2,] 2006 1
>>>  [3,] 2007 1
>>>  [4,] 2008 1
>>>  [5,] 2009 1
>>>  [6,] 2010 1
>>>  [7,] 2011 2
>>>  [8,] 2012 2
>>>  [9,] 2013 2
>>> [10,] 2014 2
>>> [11,] 2015 2
>>> [12,] 2016 2
>>> But I was not able to connect the intervals with the plot-function. I used the following formular.
>>> "plot(data$stations, data$revenue, xlab="stations", ylab="revenue", col(findInterval())"
>>> 
>> In fact I should say “feed _col_ or _pch_ argument with the result of findInterval” as below:
>> 
>> plot(data$stations, data$revenue, xlab="stations", ylab="revenue", col = findInterval(x$year, c(2005, 2010, 2015))
>> 
>> Please note that If you have many (20-30) intervals, colour handling will be more complex. But I assume you have maximum 5-10 intervals. So, the piece of code above will work for you.
>> 
>>> How can I proceed and get the plot-funktion running?
>>> Maybe it is not running because the years as single numbers are already contained in my data-frame?
>>> Cheers,
>>> 
>>> Toby
>>> 
>>> 
>>> Am 30.05.2017 um 18:26 schrieb Ismail SEZEN:
>>>>> On 30 May 2017, at 19:02, Tobias Christoph <s3tochri at uni-bayreuth.de> <mailto:s3tochri at uni-bayreuth.de> wrote:
>>>>> 
>>>>> Hey Guys,
>>>>> 
>>>>> I just try to differentiate certain values in my plot by colour or symbol.
>>>>> 
>>>>> I have panel data with three dimensions (number of stations, revenue, 
>>>>> years). To integrate the third dimension (years) in the plot, I want to 
>>>>> differentiate the values(number of stations, revenue) by a certain range 
>>>>> of years.
>>>>> 
>>>>> e.g.: 2005-2010: red coloured dots, 2011-2016, blue coloured dots
>>>>> 
>>>>> For the normal plot I used the following formula:
>>>>> 
>>>>> *plot(data$stations, data$revenue, xlab="stations", ylab="revenue")*
>>>>> 
>>>>> I only found a way to mark every single year. So hopefully you can help?
>>>>> 
>>>>> Cheers,
>>>>> 
>>>>> Toby
>>>>> 
>>>> See ?findInterval. Especially, first 3 lines in _Examples_ section. Use result of findInterval as argument to _col_ or _pch_ in plot function.
>>>> 
>>>> 
>>> 
>> 
> 


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