Text files – import and export
Saving an AcqKnowledge file as a text file.
- Go to File > Save As
- From the drop-down menu for Save as type select Text
-
Click on the Options button
-
If Include header is checked the following information will be included in the beginning
of the file: file path, sample rate, number of channels, name of each channel as well as
measurement units for each channel, etc. -
If Selected section only is checked then only the data currently highlighted (with the I-beam
tool) will be exported. -
If Horizontal scale values is selected then time values will be included as the first column
of the resulting text file.
-
In the exported text file each column represents data from a different channel. If Horizontal scale values was selected then the first column contains the time values. Here is an example of an exported text file.
C:testfile.txt
10.000000 msec/sample
3 channels
Blood Pressure
mmHg
EMG
volts
GSR
microsiemens
ms CH0 CH1 CH2
2 2 2
0,87.2121333,1.010376,3.010376
10,87.1100708,1.0100708,3.0100708
In the above example, the values should be interpreted as follows:
Blood Pressure: 87.2121333, 87.1100708
EMG: 1.010376, 1.0100708
GSR:3.010376, 3.0100708
Time: 0,10 (msec)
Importing a text file into AcqKnowledge.
1. Go to File > Open
2. From Files of type select Text file
3. Click on the Options button
The Read line option allows you to import only a section of the file
The Interval option allows you to define the sample rate
The Column delimiter allows you to specify how columns of data are separated
When importing a text file it should have the following format (the delimiter could be a comma, tab or a space):
1,2,3
11,22,33
111,222,333
1111,2222,3333
Every row corresponds to a sample point at a given time and every column contains the data for a different channel. For the above example, if the sample rate was 1 second, the file will be interpreted as follows:
| Channel/Time | 1sec | 2sec | 3sec | 4sec |
|---|---|---|---|---|
| Channel 1 | 1 | 11 | 111 | 1111 |
| Channel 2 | 2 | 22 | 222 | 2222 |
| Channel 3 | 3 | 33 | 333 | 3333 |
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