Description
Similar to peak except that there are two cutoff levels determined for the data.
Peaks are found within 10 channels from each guessed peak location (peak1 and
peak2), the cuttoff levels are then set to be flevel times each peak. The value
from the peak near first is used to set the lower channel limit and the value
from the peak near last is used to set the upper channel limit in the same
way that peak and mean set those channel limits. As with peak, you optionally
supply a noise estimate (the rms argument) which is subtracted from the peak
values before they are multiplied by flevel. The return value fields are nearly
the same as in peak. Here, the level and peak fields have 2 elements. There is
also a peakchan field which contains the refined locations of the two peaks.
Example
- d.msr().twopeak(flevel=0.5,usecurs=T)
[fluxint=94.6122732, vel=1110.71511, vwidth=109.501611, level=[0.610705972
0.489752263] , limits=[330 351] , type=twopeak, peak=[1.22141194 0.979504526] ,
peakchan=[334 336] ]
Arguments
| lv |
|
an SDRecord |
| |
|
Allowed: |
SDRecord - Not enabled |
| |
|
Default: |
F |
| first |
|
first channel number in range to integrate |
| |
|
Allowed: |
integer |
| |
|
Default: |
F |
| last |
|
last channel number in range to integrate |
| |
|
Allowed: |
integer |
| |
|
Default: |
F |
| peak1 |
|
guess of first peak channel number |
| |
|
Allowed: |
integer |
| |
|
Default: |
F |
| peak2 |
|
guess of second peak channel number |
| |
|
Allowed: |
integer |
| |
|
Default: |
F |
| flevel |
|
fractional flux level |
| |
|
Allowed: |
float |
| |
|
Default: |
0.3 |
| rms |
|
rms of spectrum |
| |
|
Allowed: |
float |
| |
|
Default: |
0. |
| usecurs |
|
optionally set ranges with cursor |
| |
|
Allowed: |
boolean |
| |
|
Default: |
F |
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