| nameleadzero {Thermimage} | R Documentation |
Add leading zeros to character for easy sequential naming of filenames.
Description
Returns a character with leading zeros according to the total number of filenames to be created. Useful when exporting multiple images arising from imported video data stored as a matrix or dataframe. By providing a base root name, the function will then add leading zeroes ahead of the number suffix (counter variable), according to the no.digits requested (i.e. Img0001.png, Img0002.png,...Img9999.png). Best used inside a loop exporting images.
Usage
nameleadzero(filenameroot = "Img", filetype = ".png", no.digits = 5, counter = 1)
Arguments
filenameroot |
Prefix or root filename, supplied as a character vector. |
filetype |
The type of file to be saved, as a character. i.e. ".png", or ".csv". |
no.digits |
The total number of digits required for the suffix portion of the complete filename. Use 2 if numbers range from 1 to 99. |
counter |
The specific counter to add to the suffix. Typically counter is a number. |
Details
Although this returns a single character value with leading zeros, it could be used in a loop to create a new, incremented file name (i.e. Img0001.png, Img0002.png, Img0003.png,... Img9999.png), or wrapped in an apply function:
Value
Returns a character value.
Author(s)
Glenn J Tattersall
Examples
# Using for-loop
prefix<-"Img_"
filetype<-".png"
no.digits<-2
for(i in 1:10){
f.txt<-nameleadzero(prefix, filetype, no.digits, counter=i)
print(f.txt)
}
# Using an apply function
x<-unlist(lapply(1:10, nameleadzero, filenameroot="Img_", filetype=".png", no.digits=2))
x