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| R2012a Documentation → MATLAB | |
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delete(obj)
delete(obj) removes obj from memory, where obj is a serial port object or an array of serial port objects.
When you delete obj, it becomes an invalid object. Because you cannot connect an invalid serial port object to the device, you should remove it from the workspace with the clear command. If multiple references to obj exist in the workspace, then deleting one reference invalidates the remaining references.
If obj is connected to the device, it has a Status property value of open. If you issue delete while obj is connected, then the connection is automatically broken. You can also disconnect obj from the device with the fclose function.
If you use the help command to display help for delete, then you need to supply the pathname shown below.
help serial/delete
This example creates the serial port object s on a Windows platform, connects s to the device, writes and reads text data, disconnects s from the device, removes s from memory using delete, and then removes s from the workspace using clear.
s = serial('COM1');
fopen(s)
fprintf(s,'*IDN?')
idn = fscanf(s);
fclose(s)
delete(s)
clear s
clear | fclose | isvalid | Status
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