Hello folks,
I have started using plotly and dash to build radio frequency spectrum data gathered from sensors. I have managed to get a spectrum display which is also known as a Heatmap (took me a while to figure this out).
The heatmap is created from a pandas dataframe with -
- x axis set to the individual columns (these are frequency columns with their levels)
- yaxis is time
- Z axis is the signal level in each of these columns.
The heatmap contains the signal levels from around 200 columns in a pandas dataframe and shows which frequencies are being measured at high levels.I have also created a drop down menu as well as a slider which looks like this -
My intended design is to make the slider as well as the drop-down box filter the dataframe that generates the heatmap. Thus by picking sensors from the drop-down menu and adjusting the slider, I need the heatmap to be updated showing the values above the slider selected value for the sensor.
How can this be achieved using callbacks?