Keithley 2651A

Model 2651A High Power System SourceMeter® Instrument Reference Manual Section 7: Command reference
2651A-901-01 Rev. A / March 2011 7-85
Usage
position, errorMsg = fileVar:seek()
position, errorMsg = fileVar:seek(whence)
position, errorMsg = fileVar:seek(whence, offset)
position
The new file position, measured in bytes from the beginning of the file
errorMsg
A string containing the error message
fileVar
The file descriptor variable
whence
A string indicating the base against which offset is applied; the whence
attribute is optional (default is "cur")
offset
The intended new position, measured in bytes from a base indicated by
whence; (optional, default is 0)
Details
The whence parameters may be any of the following:
"set": Beginning of file
"cur": Current position
"end": End of file
If an error is encountered, it is logged to the error queue, and the command returns nil and the error string.
Also see
io.open() (on page 7-100)
Reading errors
(on page 8-2)
fileVar:write()
This function writes data to a file.
Type TSP-Link accessible
Affected by Where saved Default value
Function No
Usage
fileVar:write(data)
fileVar:write(data1, data2)
fileVar:write(data1, ..., datan)
fileVar
The file descriptor variable
data
Write all data to the file
data1
The first data to write to the file
data2
The second data to write to the file
datan
The last data to write to the file
Details
This function may buffer data until a flush (fileVar:flush() or io.flush()) or close (fileVar:close()
or io.close()) operation is performed.