[R] Combining dataframes with different row numbers and plotting with ggplot2

[maryam moazam]

Dear Michael,

Thanks for your feedback. Actually, I would like to show (and compare) size
distribution of df1 and df2 in the single plot using ggplot2, something
like the attached picture. The command dosesn't lead me to this purpose.
However, I'm really new here, could you please help me more on this?


Thanks in advance,
Maryam





On Sat, Jan 9, 2016 at 5:38 PM, Michael Dewey <lists at dewey.myzen.co.uk>
wrote:

> Dear Maryam
>
> If you just need all the values of size would
> c(df1$size, df2$size)
> work?
>
> On 08/01/2016 21:44, maryam moazam wrote:
>
>> Dear Sir / Madam,
>>
>> I have just come to the amazing R software, so please be patient if my
>> question is basic for you. I have 2 text file (say 1.txt and 2.txt), each
>> file containing 2 columns and different row numbers, like below
>>
>> case size
>> case1 120
>> case2 120
>> case3 121
>> case4 121
>> case5 121
>> case6 122
>> case7 122
>> case8 123
>>
>> I would like to have a one plot for all text files, with x-axis shows the
>> size between 300-1200 with the interval of 200 (300,500,700,900,1200) and
>> size between 1201-1500 with the interval of 1000. For dataframes with the
>> equal row numbers, the following codes worked well,
>>
>> df1 = data.frame("1.txt", header=T)
>> df2 = data.frame("2.txt", header=T)
>> *combining two dataframes with equal row number*
>>
>> df = data.frame(df1$size,df2$size)
>> library(reshape)
>> melted <- melt(df)
>>
>> ggplot(data=melted, aes(value))+aes(fill=variable)+ geom_histogram
>> (binwidth =500)+
>>
>>
>> +scale_x_continuous(breaks=c(seq(300,1000,by=200),seq(1001,15000,by=1000)))
>>
>>
>> but I couldn't reproduce the plot with these codes for dataframes with
>> different row number. I think the problem is* how to combine datafrmaes
>> with the different row number*, could you please help me out on this
>> issue?
>>
>> Thank you in advance
>>
>>         [[alternative HTML version deleted]]
>>
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>>
>>
> --
> Michael
> http://www.dewey.myzen.co.uk/home.html
>
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