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User Documentation |
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| SUMMARY: fields | routine DETAILS: routine | ||||||||||
./toolbox dcresize.pro
| dcresize |
procedure dcresize, dc, newsize, [/zero], beginning=beginning |
Change the size of an existing data container.
If new channels are added to the end of an existing data container, they are filled with the blanked value (not a number, NAN) unless the /zero flag is set (in which case they are replaced with zeros). If /beginning is set then the extra channels are added to the beginning of the data and reference_channel value is adjust accordingly.
This only works for spectrum data containers where the x-axis is linear in frequency and so the x-axis values are always well-determined when extending a spectrum data container.
; double the size of dc, new channels are filled with NAN
nels = data_valid(dc)
dcresize,dc,nels*2
; back to its original size
dcresize,dc,nels
; add 100 channels, fill with 0.0
dcresize,dc,(nels+100),/zero
; to use this, or any toolbox function, on a DC in the !g
; structure, do this
dc = !g.s[0]
nels = data_valid(dc)
dcresizse,dc,nels+200
| Parameters | |
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dc |
The data container to resize. |
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newsize |
The new number of channels. This must be > 0. |
| Keywords | |
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zero |
If set, any new channels are filled with zero instead of NAN. |
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beginning |
. |