python - Extract indices of array outside of a slice -

-

i want perform statistics on annulus around central portion of 2d array (performing statistics on background around star in image,for instance). know how obtain 2d slice of region inside of array , return indices of slice, there way of obtaining indices of values outside of slice?

i have 2d array called 'z' , box size (psf_box) around want perform statistics. i've got far:

center = np.ceil(np.shape(z)[0]/2.0) # center of array # make 2d slice of star, , convert pixels nan annulus[center-ceil(psf_size/2.0):center+ceil(psf_size/2.0)-1,\ center-ceil(psf_size/2.0):center+ceil(psf_size/2.0)-1] = np.nan np.savetxt('annulus.dat',annulus,fmt='%s')

i convert pixels inside of box slice nan, don't know how output indices of pixels outside of box not 'nan'. or better yet, there way perform operations on area around slice directly? (as opposed outputting pixel values aren't nan)

i hope represents want do, ie. elements of annulus in 2d data. if data outside annulus change condition.

import numpy np  #construct grid x= np.linspace(0,1,5) y= np.linspace(0,1,5) xv,yv = np.meshgrid(x, y, sparse=false, indexing='ij')   # gaussian function x0,y0=0.5,0.5 zz= np.exp(- (xv-x0)**2 - (yv-y0)**2)  # function on grid  print 'function\n', zz # distance metric on grid distance =  np.sqrt(   (xv-x0)**2+ (yv-y0)**2)   print 'distance center\n', distance  # make condition , apply array cond= (distance>0.3) & (distance<0.7) print  'selection\n',zz[cond]   # if care locations of annulus    print xv[cond] print yv[cond]

output:

function [[ 0.60653066  0.73161563  0.77880078  0.73161563  0.60653066]  [ 0.73161563  0.8824969   0.93941306  0.8824969   0.73161563]  [ 0.77880078  0.93941306  1.          0.93941306  0.77880078]  [ 0.73161563  0.8824969   0.93941306  0.8824969   0.73161563]  [ 0.60653066  0.73161563  0.77880078  0.73161563  0.60653066]] distance center [[ 0.70710678  0.55901699  0.5         0.55901699  0.70710678]  [ 0.55901699  0.35355339  0.25        0.35355339  0.55901699]  [ 0.5         0.25        0.          0.25        0.5       ]  [ 0.55901699  0.35355339  0.25        0.35355339  0.55901699]  [ 0.70710678  0.55901699  0.5         0.55901699  0.70710678]] selection [ 0.73161563  0.77880078  0.73161563  0.73161563  0.8824969   0.8824969   0.73161563  0.77880078  0.77880078  0.73161563  0.8824969   0.8824969   0.73161563  0.73161563  0.77880078  0.73161563] [ 0.    0.    0.    0.25  0.25  0.25  0.25  0.5   0.5   0.75  0.75  0.75   0.75  1.    1.    1.  ] [ 0.25  0.5   0.75  0.    0.25  0.75  1.    0.    1.    0.    0.25  0.75   1.    0.25  0.5   0.75]

see great answer : numpy function multiple conditions


Comments

Post a Comment

Popular posts from this blog

java - Run spring boot application error: Cannot instantiate interface org.springframework.context.ApplicationListener -

-
i have spring project , try make use spring boot , run @ embadded tomcat following : https://spring.io/guides/gs/rest-service/ this application //@configuration //@enableaspectjautoproxy @springbootapplication @componentscan(basepackages = "gux.prome") public class application { public static void main(string[] args) { springapplication.run(application.class, args); } } if use maven command: mvn spring-boot:run , project starts fine, need debug , run main method @ intelij, exception occurs: exception in thread "main" java.lang.illegalargumentexception: cannot instantiate interface org.springframework.context.applicationlistener : org.springframework.boot.logging.classpathloggingapplicationlistener @ org.springframework.boot.springapplication.createspringfactoriesinstances(springapplication.java:414) @ org.springframework.boot.springapplication.getspringfactoriesinstances(springapplication.java:394) @ org.springframework.bo...
Read more

python - pip wont install .WHL files -

-
when try install .whl gohike typing cmd c:\users\owner\downloads>pip install ta_lib-0.4.9-cp27-none-win_amd64.whl i print out: `processing c:\users\owner\downloads\ta_lib-0.4.9-cp27-none-win_amd64.whl complete output command python setup.py egg_info: traceback <most recent call last>: file "<string>", line 1, in <module> ioerror: [errno 2] no such file or directory:'c:\\users\\owner\\appdata\\lo cal\\temp\\pip-9gwk2c-build\\setup.py' ----------------------------------------- command "python setup.py egg_info" failed error code 1 in c:\users\owner\ap pdata\local\temp\pip-9gwk2c-build\` the part between pip- , -build in pip-9gwk2c-build different on same file. i asked python 2.7.11 pip 8.0.3 can't install gohike whl of ta-lib 0.4.9 few days ago , decided ask differently. can me! you have outdated pip not understand wheels. wheels not supposed have setup.py inside. try upgrading pip pip in...
Read more

Excel VBA "Microsoft Windows Common Controls 6.0 (SP6)" Location Changes -

-
i have excel workbook used generate quotations customers. there main page user inputs data, , there buttons generate various pdfs , send them customer. however, 1 user consistently getting error preventing generating , sending pdfs. i beleive "microsoft windows common controls 6.0 (sp6)". it's installed on users' computers. on mine, location "c:\windows\syswow64\mscomctl.ocx" on others "c:\windows\system32\mscomctl.ocx" the user experiencing issues on 32-bit machine, "mscomctl.ocx" file should in system32. have manually put in there, , pointed common controls reference in vba it. issue seems keep reverting looking in syswow64. since folder doesn't exist, can't find it, , can't produce pdfs. i thought perhaps issue user running older version of office (2007) there users on 2013 , 2016. thought perhaps mixture of 64-bit , 32-bit users. user gets sent workbook other users (as quotation process goes further, gets passed ...
Read more