pg.plot fillLevel= ... horizontal color fill

[Alexey Shulgin]

Hi, I have a question regarding use of fill color for plot items.

Basically I have an app which plots few linear data graphs in a normal fashion y(x) and I can specify fillvalue=a to use it as a base for color filling.

----

for n in range(len(self.data)):

    self.graph.plot(freq, 

                               self.pos_geophone1 + n * self.geophones_dx
                               - 4.5 * np.sqrt(spec[n])/np.max(np.sqrt(spec[n])),
                               fillLevel=self.pos_geophone1 + n * self.geophones_dx, 

                               brush=(120, 120, 220, 120),
                               pen=pen)

see screenshot below:

I want to add an option to display same data but running vertically (kind of rotating entire plot 90 degrees). As pyqtgraph is bad with rotating graphs - the easiest solution is just to flip data columns is pg.plot()

----

for n in range(len(self.data)):
    self.graph.plot(self.pos_geophone1 + n * self.geophones_dx

                               - 4.5 * np.sqrt(spec[n])/np.max(np.sqrt(spec[n])),

                               freq,
                               fillLevel=self.pos_geophone1 + n * self.geophones_dx, 

                               brush=(120, 120, 220, 120),
                               pen=pen)

I'm getting following plot:

basically blue infill works incorrectly.

Any advise how this can be fixed - how to specify fillLevel in x domain, instead of standard y-domain?

Thanks in advance

[Martin Chase]

Hey Alexey,

Sorry for the late reply; your message ended up in my spam folder.

Basically, no, pyqtgraph's fill feature has the axis hard-coded, so it is trying to fill vertically despite the intent of your data.

Best,

 - Martin