How to check if float pandas column contains only integer numbers? Question: I have a dataframe df = pd.DataFrame(data=np.arange(10),columns=[‘v’]).astype(float) How to make sure that the numbers in v are whole numbers? I am very concerned about rounding/truncation/floating point representation errors Asked By: 00__00__00 || Source Answers: Comparison with astype(int) Tentatively convert your column to int …
How to calculate precision and recall in Keras Question: I am building a multi-class classifier with Keras 2.02 (with Tensorflow backend)，and I do not know how to calculate precision and recall in Keras. Please help me. Asked By: Jimmy Du || Source Answers: As of Keras 2.0, precision and recall were removed from the master …
Inconvenience to use single precision floats in numpy Question: When writing code using single precision (float32) in numpy, it is too hard to write. First, the decalartion of single presion float is too long. We have to type all variables as follows. a = np.float32(5) But some other language use simpler representation. a = 5.f …
Precise nth root Question: I’m looking for Python Nth root function/algorithm but before you post: NO INTEGER ROOT, HELL! Where could I obtain at least a guide how to program Nth root function that produces precise float/Decimal? Such function that doesn’t return 1 nor 0 for root(125, 1756482845) (1st argument is the number, 2nd is …
How to perform unittest for floating point outputs? – python Question: Let’s say I am writing a unit test for a function that returns a floating point number, I can do it as such in full precision as per my machine: >>> import unittest >>> def div(x,y): return x/float(y) … >>> >>> class Testdiv(unittest.TestCase): … …
How to properly round-up half float numbers? Question: I am facing a strange behavior of the round() function: for i in range(1, 15, 2): n = i / 2 print(n, “=>”, round(n)) This code prints: 0.5 => 0 1.5 => 2 2.5 => 2 3.5 => 4 4.5 => 4 5.5 => 6 6.5 => …
Convert a list of float to string in Python Question: I have a list of floats in Python and when I convert it into a string, I get the following [1883.95, 1878.3299999999999, 1869.4300000000001, 1863.4000000000001] These floats have 2 digits after the decimal point when I created them (I believe so), Then I used str(mylist) How …
Precision of decimals in Python Question: I don’t mean precision as in how many numbers are displayed after the decimal. I mean precision as in the decimal I am trying to use in this pictograph function keeps coming up one tenth shy of what it should be. I have tried using multiple different strategies including …
Double precision floating values in Python? Question: Are there data types with better precision than float? Asked By: kravemir || Source Answers: Python’s built-in float type has double precision (it’s a C double in CPython, a Java double in Jython). If you need more precision, get NumPy and use its numpy.float128. Answered By: Fred Foo …
Determine precision and scale of particular number in Python Question: I have a variable in Python containing a floating point number (e.g. num = 24654.123), and I’d like to determine the number’s precision and scale values (in the Oracle sense), so 123.45678 should give me (8,5), 12.76 should give me (4,2), etc. I was first …
