python - pyqtgraph changing limits on displayed color scale using pyqtgraph.image() -


i'm trying change scale of data being displayed (not sure if called) want change range circled in red 3-6 default when launches

look red

everything i've read suggests should simple grabbing imageview object , calling setlevels() shown here. problem can't find imageview object found within imagewindow.

here's initial code

imv = pg.image(amps) okay = imv.imageitem  imv.view.setaspectlocked(ratio = 4) print( vars(imv)) imv.setlimits(3,6)  win = qtgui.qmainwindow()  #im.setlookuptable(lut) if __name__ == '__main__':     import sys     if (sys.flags.interactive != 1) or not hasattr(qtcore, 'pyqt_version'):                     qtgui.qapplication.instance().exec_()

but says imagewindow has no attribute setlimits.

i tried searching imageview running

print(vars(imv))

but closest thing find imageitem but

imv.imageitem.setlevels(3,6)

raises error of "levels argument must 1d or 2d". makes me think not right path.

thanks help

edit:

i tried 

imv.imageitem.setlevels((3,6))

which produces following

new picture

the range correct on data, legend on right not updated correctly

imagewindow subclass of imageview, same methods should apply. documentation here: http://www.pyqtgraph.org/documentation/widgets/imageview.html#pyqtgraph.imageview.setimage

these different ways of writing approximately same thing:

# 1: pg.image(data, levels=[3, 6])  # 2: imv = pg.image(data) imv.setlevels(3, 6)  # 3: imv = pg.imageview() imv.setimage(data, levels=[3, 6])

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