Something makes y-axis range too wide

General Usage
1

Something is odd.clearance max (0.9) and clearance min (0.522) are supposed to be constant throughout my simulation, so they should be straight lines, which they are. The strange thing is when plotting them, the y axis are much larger than they need to be.

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I am using Julia 1.4.2 and Plots.jl and all my other graphs look normal. Is it possible to have non-recorded (invisible) values of clearance max and clearance min that confuse Julia (now I sound like a conspiracy theorist)? This occurs even if I restart Julia and it is the first plot I make.

I can’t provide a MWE but I suspect the problem may lie with this nested part of my differential equation. Even though it is designed to prevent the clearance rate from going over clearance max, it still does.

        if clearance_V_type == 4
            if (revenue - cost_F) > 0.0
                limit = clearance_max
                effect = abs(max(0.0, (limit - clearance_V)))
            else
                limit = clearance_min
                effect = abs(min(0.0, (limit - clearance_V)))
            end
            dB[num_nutrient+num_plant+num_animal+num_vessel_types+1] = 365.25*µ*(revenue - cost_F)*effect
            clearance_V = bioS[num_nutrient+num_plant+num_animal+num_vessel_types+1]
            global db_clearance = dB[num_nutrient+num_plant+num_animal+num_vessel_types+1] # this is global because unfortunately I need it in the global scope so I can save the value
        end
2

Try to save the actual (x, y) data you are plotting and inspect it, eg extrema(y).

1 Like
3

If Plots can’t figure out the y axis limits from the data given (which is the case when your curve is constant) it just adds 1.
The solution is to explicitly set the ylims you want to have.

1 Like
4

Neat! I didn’t know that.