Keithley System SourceMeter 2601B, Reference Manual

Page: 450 / 864

Section 7: TSP command reference Series 2600B System SourceMeter® Instrument Reference Manual
7-110 2600BS-901-01 Rev. B / May 2013
Usage
data1 = io.read()
data1 = io.read( format1 )
data1, data2 = io.read( format1, format2 )
data1, ..., dataN = io.read( format1, ..., formatN )
data1 The data read from the file
data2 The data read from the file
dataN
The data read from the file; the number of return values matches the number
of format values given
format1 A string or number indicating the type of data to be read
format2
A string or number indicating the type of data to be read
formatN A string or number indicating the 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:
Format parameter Description
"*N" Returns a number
"*a" Returns the whole file, starting at the present position; returns an empty string if it is at the
end of file
"*l" Returns the next line, skipping the end of line; returns
nil
if the present 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 (0); returns
nil
if
the present file position is at the end of file
Any number of format parameters may be passed to this command, each corresponding to a returned data
value.
If no format parameters are provided, the function will perform as if the function was passed the value
"*l"
.
Also see
None
io.type()
This function checks whether or not a given object is a file handle.
Type TSP-Link accessible Affected by Where saved Default value
Function No
Usage
type = io.type( obj )
type Indicates whether the object is an open file handle
obj
Object to check
Details
Returns the string
"file"
if the object is an open file handle. If it is not an open file handle,
nil
is returned.
Also see
io.open() (on page 7-108)