problem in define "b" variable in __init__ file line 219

[mahdishemshadi]

Hi
I tried to change the length of "hist " variable in "plot_sup_res_learn" method in init.py file, the default was '2019-10-07' and I changed it to '2019-10-27'. I got an error 'ValueError: cannot convert float NaN to integer'.
when I debug the code I found this line in init.py file line 219 that causes the error. b = hist.Close.iloc[-10] - m * 0 - mn.
some times the value of 'b' becomes 0 and it causes other problems in next lines.
In the following of the line 219, this expression was commented: + height * 0.2
and height was calculated in line 214 and it was also commented

My question is what if I uncomment the line 214 and this expression in line 219 " + height * 0.2"?
How does it affect on the next calculation?

Thanks