Idl rebin pro#

Or, Use Count to get the number of nonzero elements: index = WHERE(array GT 5, count) Only subscript the array if it is safe: IF count NE 0 THEN array = 5 Examples For example: Use /NULL, if no elements match then array will not be modified: array = 5 To avoid this problem, you should either use /NULL or check the Count argument before indexing. If you use this result as an index into another array without checking for РІР‚вЂњ1 first, then this will return the last element of the array. If the NULL keyword is not set, and all the elements of Array_Expression are zero, then WHERE returns a scalar integer with a value of РІР‚вЂњ1. Frequently the result of WHERE is used as a vector subscript to select elements of an array using given criteria. The length of the resulting vector is equal to the number of nonzero elements in Array_Expression.

Idl rebin pro#

Here you can download the PRO file.The WHERE function returns a vector that contains the one-dimensional subscripts of the nonzero elements of Array_Expression. IF (y_ma_indx GT 0 ) THEN yy =FLTARR (N_ELEMENTS (y_ma_indx ) ) +!Y.CRANGE Fill the histogram plot IF (y_mi_indx GT 0 ) THEN yy =FLTARR (N_ELEMENTS (y_mi_indx ) ) +!Y.CRANGE IF (N_ELEMENTS (cont0 ) NE 1 ) THEN BEGIN Yy = REBIN (y, N_ELEMENTS (y ) * 2, /Sample ) Check if the continuum is a constant Xx = Create array with the corresponding y -values Xx = REBIN (xnew, N_ELEMENTS (xnew ) * 2, /sample ) OPLOT, x, y, COLOR =LINECOLOR, psym =psym PRO fillspec, x0, y0, cont0, LINECOLOR =LINECOLOR, psym =psym, FILLCOLOR =FILLCOLOR Fix the bug that this pro may change the variables. Fix the bug when the continuum is not a constant value. Fix the bug when values beyong YRANGEs are presented. RESTRICTIONS : (Please check if all the variables are in the same order ) MODIFICATION HISTORY : Write, 2012 -04 - 21, Chentao Yang ) Only for filling the spectrum after plot the spectrum using input the corresponding continuum value (array ) IDL > fillspec, x, y, continuum, psym = 10, linecolor = 220, fillcolor = 50 SIDEEFFECT. input the velocity /frequency /wavelength array fillcolor =: Set the color that fill the space between flux value linecolor =: Set the spetrum stroke color. KEYWORD INPUTS : psym =: Set the plotpsym. The velocity /frequency /wavelength, flux value and CALLING SEQUENCE : fillspec, x, y, continuum, psym =, linecolor =, fillcolor = INPUTS : x, y, continuum. Kexin, I found a way through some simple calculation that can solve this pro file written by others for this purpose, namely unable to set PSYM = 10 if using POLYFILL directly. I firstly tried the POLYFILL, but failed with the PSYM, PURPOSE : Two days ago I encountered a problem with plotting spectra using : plot, x, y, PSYM = 10 in IDL when I tried to fill the area between the signal and continuum

Note Filling spectral plot (psym=10) in IDL.

Integrated = integrated /MAX (integrated ) Radius = FINDGEN (SQRT (MIN ( ) ) * 0.7 )Р”Р‡OR i = 0, (SIZE (radius, /N_ELEMENTS ) - 1 ) DO BEGIN

Image_dist = SQRT (image_xdist +image_ydist ) Image_ydist = TRANSPOSE (FINDGEN (image_size ) #TRANSPOSE(FINDGEN(image_size)*0+1)) Image_xdist = FINDGEN (image_size ) #TRANSPOSE(FINDGEN(image_size)*0+1) IF (SIZE (WHERE (FINITE (image, /NAN ) ), /N_ELEMENTS ) GT 1 ) THEN image = 0 get the index of the maximum point

PRO radial_power, image, radius, integrated NEED 'wherenan.pro' MODIFICATION HISTORY : Write, Chentao YANG ), 2013 -02 -04 this pro is not available, but you can edit it to make it you want to study two objects with comparable peak flux, RESTRICTIONS : This pro is only useful for one peak structure, namely if this will return the radius, and integrated. IDL > radial_power, image, radius, integrated input the image into the variable after read the image from FITS file or other file format. integrated : the normalized integrated power within the radius.

OUTPUTS : radius : the radius from center to each circle. INPUTS : image : read image from a FITS file and put it into a variable. CALLING SEQUENCE : PRO radial_power, image, radius, integrated PURPOSE : Calculating the radial_power, returning radius and normalized