In error function

#1

if I append the value returned from error function then extra term also come why?
like:- [array([0.09379479])]
why array is written here as I only returned value not array

#2

Hey @Jan19LPN0013, could you pls share the code of your error function by saving it on cb.lk/ide.

#3

here is the code plz check why array is written:- https://ide.codingblocks.com/s/222250

#4

Hey @Jan19LPN0013, your code is fine, just make in line 31 your code line is

e=error(X,Y,thetha)

it should be

e=error(X,Y,thetha)[0]

Hope this resolved your doubt.
Plz mark the doubt as resolved in my doubts section. :blush:

#5

but why we should use [0] at the end as I only passed a value from error function why an extra term array is appended in the list

#6

Hey @Jan19LPN0013, its becauese e is a numpy array, that’s the reason we add [0], which will extract 0th element from the numpy array. Otherwise e will be a numpy array and when you add it to list, array word will be printed when you print th error_list to signify that the values ahead is the numpy array.

Hope this resolved your doubt.
Plz mark the doubt as resolved in my doubts section. :blush:

#7

but when we print thetha in that array is not written why?
as we have done the same steps for thetha_list also

#8

Hey @Jan19LPN0013, in case of such small doubts, just try to print and explore yourself, you need not to depend on us for clarification. Here’s what you should have tried,

1
1777×443 23.6 KB

Hope this resolved your doubt.
Plz mark the doubt as resolved in my doubts section. :blush:

#9

image
image952×591 12.6 KB

my only problem is why error function is returning array instead of float value and I have created my own error function in which I passed the only array a same as main error function but that does not return array it returns an only value and why main error function return array plz explain?

#10

Hey @Jan19LPN0013, instead of passing a[0], this is because hypothesis function in our code returns, numpy array of shape (1,) and not a scalar value. Try to print it using print statement.