Different Python minimization functions give different values, Why?
By : Osiel Alberto Castil
Date : March 29 2020, 07:55 AM
Hope that helps My answer is probably off point, because your question was for help debugging your current implementation. That said, if you're interested in using readymade optimisers in Python then have a look at OpenOpt. The library contains reasonably performant implementations of optimisers for a wide variety of optimisation problems.

Why do Python's trigonometry functions give different results than my calculator?
By : jirik
Date : March 29 2020, 07:55 AM
I wish did fix the issue. Take a look at the documentation for the math.tan function in Python: code :
math.tan(math.radians(ang))

Same math and numpy functions don't give the same result when applied to pixels values
By : user2799758
Date : March 29 2020, 07:55 AM
I wish this help you The problem is the pow function to a np.uint8 array. First, lets have a simple example: code :
>> a = np.arange(20, dtype=np.uint8).reshape(4,5)
array([[ 0, 1, 2, 3, 4],
[ 5, 6, 7, 8, 9],
[10, 11, 12, 13, 14],
[15, 16, 17, 18, 19]], dtype=uint8)
>> np.power(a,2)
array([[ 0, 1, 4, 9, 16],
[ 25, 36, 49, 64, 81],
[100, 121, 144, 169, 196],
[225, 0, 33, 68, 105]], dtype=uint8)
>> pow(a,2)
array([[ 0, 1, 4, 9, 16],
[ 25, 36, 49, 64, 81],
[100, 121, 144, 169, 196],
[225, 0, 33, 68, 105]], dtype=uint8)
b = np.float32(b) #same for g and r or to the whole image
# or this
b, g, r = cv2.split(np.float32(img))

Python why do my nested functions give a Nonetype error?
By : cheral
Date : March 29 2020, 07:55 AM
should help you out You're confusing a bunch of programming concepts: Don't declare a function whenever you only need a statement You're confusing function declaration with function call (invocation), and also the nesting is pointless. Declaring nested fn2 inside of fn1 doesn't magically also call fn2 and also transmit its returnvalue back to fn1. You still have to use an explicit returnstatement from each fn.(If you forget that, you're implicitly returning None, which is almost surely not what you want) For now, just don't ever nest functions at all. Functions with no arguments are essentially useless, they can't take inputs and compute a result. Figure out what their arguments should be.

How can I give values to an array in structure in C without any functions?
By : Rikachu
Date : March 29 2020, 07:55 AM
This might help you How can I write the program below without any functions like strcpy()? I know that we can do it with functions but I want to know learn how to do it without any function. , With C99 (or newer):

