Keithley 3700A Series Reference Manual

Series 3700A System Switch/Multimeter Reference Manual Section 11: TSP command reference
3700AS-901-01 Rev. D/June 2018 11-243
fileVar:read()
This function reads data from a file.
Type
TSP-Link accessible
Affected by
Where saved
Default value
Function
No
Usage
data1 = fileVar:read()
data1 = fileVar:read(format1)
data1, data2 = fileVar:read(format1, format2)
data1, ..., datan = fileVar:read(format1, ..., formatn)
data1
First data read from the file
data2
Second data read from the file
datan
Last data read from the file
fileVar
The descriptor of the file to be read
format1
A string or number indicating the first type of data to be read
format2
A string or number indicating the second type of data to be read
formatn
A string or number indicating the last type of data to be read
...
One or more entries (or values) separated by commas
Details
The format parameters may be any of the following:
"*n": Returns a number.
"*a": Returns the whole file, starting at the current position (returns an empty string if the current file
position is at the end of the file).
"*l": Returns the next line, skipping the end of line; returns nil if the current file position is at the
end of file.
n: Returns a string with up to n characters; returns an empty string if n is zero; returns nil if the
current file position is at the end of file.
If no format parameters are provided, the function will perform as if the function is passed the value
"*l".
Any number of format parameters may be passed to this command, each corresponding to a returned
data value.
Also see
File I/O (on page 9-27)
fileVar:write() (on page 11-245)
io.input() (on page 11-254)
io.open() (on page 11-255)

Keithley 3700A Series Specifications

General

Brand	Keithley
Model	3700A Series
Category	Multimeter
Language	English