CODEWITHSUNDEEP
rplot
user2082985
user2082985

Reputation: 85

Formal argument "type" matched by multiple actual arguments

I have translated a program from R to C++. The program in question runs multiple iterations of itself with different values then produces a histogram and plot. C++ graphs are finicky so I decided to save the values in csv format and graph them in R. The files are fairly large, for smaller size files, 10 iterations produces 23000 rows and 3 columns. Of course this increase drastically for 100 or 1000 iterations. The format of the csv files is 1,3,0.0107171 which corresponds to col num, row num and data. Then I run this into R:

>data<-read.csv(file.choose(),header=T)
>plot(data,type="b", pch=19, xlab="X", ylab="Y")
Error in plot.default(...) : 
  formal argument "type" matched by multiple actual arguments

As a side note:

> hist(data[,3], xlab="Step length (m)", main="")

the histogram works without any problems. Please tell me if i can provide any more details, I am not so good when it comes to R so I might be missing something obvious. Thanks in advance.

Upvotes: 6

Views: 41037

Answers (3)

David Streuli
David Streuli

Reputation: 81

In my case, this indicated that my input data structure was not numeric. I solved it using as.numeric, as follows:

plot(as.numeric(df[1, 1:9]), as.numeric(df[2, 1:9]),   
    las = 2, type = "l", 
    col = colrs[3],lwd = lwds[1], ylim = c(0, 1.05*maxnumb), xlim = c(-0.6, yAx), main = weDraw, ylab = "OD 600", xlab = "hours", xaxt = "n")

Upvotes: 0

llltrunkslll
llltrunkslll

Reputation: 1

Sorry for late reply. I encountered this and it was due to passing the plot function a data.frame from inside another function. The work around was to simply do this:

do.plot <- function(df = plot.df[c(1, 2), ]) { as.matrix(df) plot(.....)}

Upvotes: -2

mnel
mnel

Reputation: 115382

You are passing a data.frame to plot, which dispatches plot.data.frame, which will, for a data.frame with more than 2 columns, call 

pairs(data.matrix(data))

So you could pass arguments in ... that are valid for pairs (type is not)

However I think you probably want to think about what you want to plot from your data

  • What should be on the x axis
  • What should be on the y axis

And then create your call to plot (or perhaps matplot) as required.

Upvotes: 8

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