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Version 1.9 Build 1488

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Editing via X,Y plots

msplot will plot any of a range of quantities in X,Y scatter plots. This may then be edited by drawing a box on the display using the mouse.

• Use the X axis, and Y axis buttons to control what is plotted along the axes.
• Optionally use the Polarization Selection button to select the polarizations to be plotted e.g. RR, RL, LR, or LL. You can usually leave this as the default, and all full polarizations will be displayed (as different colors).
• Optionally use the Spectral selection button to select the Spectral Windows and the range of channels.
• Optionally use the Fields button to further select the data.
• To start flagging, move to the plot window. You will select regions by pressing the mouse button 1 (usually the left button), and then dragging to the top right corner. The selected region will be drawn in a green cross-hatched pattern, and the coordinates of the region will be printed out. You may make as many of these regions as you like.
• To control whether the edits are applied to all channels and all correlations uniformly, you may select the corresponding button on the edit window.
• To see the currently defined edits, press the List button.
• If you make a mistake, press the Cancel button to forget the current edit or Clear to forget all the stored edits. Note that the cross-hatched region will remain but will turn light grey.
• Once you are finished defining edits, they may be applied and the display reloaded using the Apply button. You may now continue defining more edits.
• If you really mess up, then you may revert to the original flagging status on startup using the Revert button.

The same set of steps may be used with the Locate button instead of the Flag button. This lists the selected points to the logger. No flagging is done. This is useful for finding outlier points.

The flags are applied with each press of the Flag button. On exit from msplot, you will be asked whether to keep these flags permanently or to restore the old flag columns. If you choose to keep these flags, then the flag column table will contain the flag columns as they were prior to this run of msplot. If you choose to restore the old flagg columns then the flag column table will contain the flag columns after applying these edits.