[R] R - Reading a horizontally arranged csv file, replacing values and saving again

[Manoranjan Muthusamy]

I have a horizontally arranged CSV file
<https://www.dropbox.com/s/0ukyuifvpq1olqk/samplefile.csv?dl=0> (
samplefile.csv) with headers are in the first column. Also, each row has a
different number of columns. I want to read this CSV file, replace one of
the cell value and save again as a CSV file with the same format as the
original file with exactly same number of columns and rows. It sounds like
a simple task, but I am struggling to find a way. I tried to do this with
the help of this
<https://stackoverflow.com/questions/17288197/reading-a-csv-file-organized-horizontally>
 and this
<https://stackoverflow.com/questions/20308621/how-do-i-write-a-csv-file-in-r-where-my-input-is-written-to-the-file-as-row>
posts,
but still, I can't get the output the way I want. Can somebody help me here?

My attempt using the answer in this post
<https://stackoverflow.com/questions/17288197/reading-a-csv-file-organized-horizontally>
to
read the CSV file (samplefile.csv) gives me the following output where
headers are kinda messed up and empty cells are replaced with NA values
which is not what I want

aaa <- read.tcsv("samplefile.csv")
aaa

     Header.1 Header.2..units. Header.3..units. Header.3..units..11
Some text           0.0625                0             2648962
<NA>           0.0625             1200             6647473        <NA>
          0.0625             1380                  14        <NA>
     0.2500             1500                  15        <NA>
0.6250             1620                 NA6        <NA>
1.3125             1740                 NA7        <NA>
2.4375             1860                 NA8        <NA>
3.5625             1980                 NA9        <NA>
4.6250             2100                 NA10       <NA>
5.0000             2220                 NA11       <NA>
5.0000             2340                 NA12       <NA>
4.6250             2460                 NA13       <NA>
3.5625             2580                 NA14       <NA>
2.4375             2700                 NA15       <NA>
1.3125             2820                 NA16       <NA>
0.6250             2940                 NA17       <NA>
0.2500             3060                 NA18       <NA>
0.0625             3180                 NA19       <NA>
0.0000             3300                 NA20       <NA>
0.0000            18000                 NA

Also, I am not sure how to go back to original format when I save the file
again after a modification (for example after replacing a cell value)

I tried saving the file again by using t (transpose) as given below

write.csv(t(aaa), file ="samplefile_e.csv", row.names=T)

but still, there are following issues in the saved file

   1. messed up headers
   2. empty cells are replaced with NA
   3. when I open the file in a text editor all the values are shown as
   characters

Thanks,
Mano

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