fdiff | reduce risk for human errors | Database library
kandi X-RAY | fdiff Summary
kandi X-RAY | fdiff Summary
Tool to reduce risk for human errors when deploying functions and views in a PostgreSQL database.
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QUESTION
Here is the problem.
I have a file, where I need to go through and replace instances of numbers with their corresponding name/ID, in the first and second columns.
The file in question looks like this, which we shall call samples.txt:
...ANSWER
Answered 2022-Mar-09 at 18:45For doing all the replacements in a single awk
call you could do:
QUESTION
I would like to specify the derivative of a function that is also a function. Is there a way how to do this in sympy?
An example how it could look like:
...ANSWER
Answered 2020-Mar-31 at 13:37A function and derivative are just expressions so you are free to define them as you wish:
QUESTION
Rader DFT algorithm implemented using GNU Octave (for example, length 11). I used this wikipedia article. The values obtained are correct, but they are incorrectly reindexed. I can not understand where the error is?
upd. Add function for finds the smallest generator of the group.
...ANSWER
Answered 2020-Mar-30 at 16:14I fixed the error. Working code here
QUESTION
I want to calculate derivative of a function using following code.
...ANSWER
Answered 2020-Feb-13 at 12:35SymPy has built in rules which allow certain transformations to happen (automatically, sometimes) or to be prohibited (by default). When you defined pi
as a Symbol, you created a generic symbol with the only assumption being that it is commutative. But the number pi
is that and it is positive. That assumption allows something like sqrt(x/y)
to automatically rewrite as sqrt(y)*sqrt(x)/y
if y
is positive:
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