spx | Proxy a URL with a custom scheme | Proxy library
kandi X-RAY | spx Summary
kandi X-RAY | spx Summary
spx - scheme proxy. A simple tool that allows naive proxying of urls with custom schemes. Useful for cases when you don't have an ability to use original url, because of some limitations (ex. urls on Notion).
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QUESTION
I am trying to compute the divergence of a vector field:
...ANSWER
Answered 2021-Jun-15 at 15:26Let me 1. explain the reason behind this observation, and 2. how to fix it.
Reason:One needs to be careful about how the data is oriented when computing the divergence (or the gradient in general), since it is important to compute the gradient along the correct axis to obtain a physically valid result.
np.meshgrid can output the mesh in two ways, depending on how you set the index parameter
Index "xy" : Here, for every y value, we sweep the x-values.QUESTION
I am learning C programming from "Learn c the hard way by Zed Shaw". He asks the learner to try and break their own code.
So I tried the following C code and thought printing more values that I gave argv will break it but it did not until later.
...ANSWER
Answered 2021-May-30 at 09:48A segmentation fault happens when the code try to access a memory region that is not available.
Accessing an array out of bounds doesn't means that the memory before or after the area occupied by the array is not available: The compiler or the runtime usually put all varibales or data in general in a given block of memory. If your array is the last item of such a memory block, the accessing it with a to big index will produce a Segmentaion Fault but is the array is in the middle of the memory block, you will just access memory used for other data, giving unexpected result and undefined behavior.
If the array (In may example, but valid for anything) is written, accessing available memory will not produce a segmentation fault but will overwrite something else. It may produce unexpected results or crash or segmentation fault later! This kind of bug is frequently very difficult to find because the unexpected result/behavior looks completely independent of the root cause.
QUESTION
I have a DataFrame that looks like this. How do I get rid of the rows that contain a Nan?
I have tried several iterations, for example
...ANSWER
Answered 2021-May-22 at 00:18You are effectively dropping the NaN
rows. However, the method returns a new copy with the rows removed. You need to do this:
QUESTION
I have a tsibble
matrix that grows 32 rows larger every day from incoming data, I would like to only plot the past 5 days in my plotting function which requires me to subset (32*5) 160 of the bottom rows. The dates for each row change every 32 rows, as new daily data comes in.
E.g
...ANSWER
Answered 2021-May-07 at 18:52I was able to circumvent the error I was encountering from the creation of my original data set by using this simple bit of code. Not a fix to the error, but a way around it.
QUESTION
I have a data frame that I am converting into a tsibble
time series object to allow for easier timeseries graphing and manipulation (rolling time window analysis) of data. I obtain new data daily that I would like to append on to the original data frame represented as df
, new incoming data is represented as df2
. I can change these data.frame
's into a tsibble
objects independently, but when I use rbind()
to join them first and then use as_tsibble
, I get an error.
ANSWER
Answered 2021-May-06 at 01:20A tsibble must have a unique time point (the index
) for each observation in a time series, where each time series is identified by the key
.
The datasets that you have constructed for your MRE appear to have this quality, however the conversion to date is not giving you the desired results. For example, your index variable in df
is:
QUESTION
Hi i want to show SPX price in my app and have this json API i need to select just SPX data fron this API how can i do that??
...ANSWER
Answered 2021-Mar-30 at 04:27This might work
QUESTION
I have the following code for adding Calendar events from Google Sheets, but it is not working. It is not showing any errors or anything, just that it is not updating the Calendar. Any ideas what I might have done wrong? I tried without the "new Date" on the Start and End dates as well.
...ANSWER
Answered 2021-Mar-27 at 14:47So this might be a good starting point to begin debugging again.
QUESTION
There have been similar questions but I've not quite been able to get it right - apologies for duplications. What I would like to do is create dataframe names inside a dictionary based on variables as I iterate.
...ANSWER
Answered 2021-Mar-16 at 00:27If you're using Python 3, you can use f-strings:
QUESTION
I have a data fram like this named rest,
...ANSWER
Answered 2021-Mar-13 at 11:49It works on the index, so x
passed to the get_year
lambda is rest.index
, and x.year
is rest.index.year
, which is well defined.
Here's the DataFrame.groupby
documentation reference:
DataFrame.groupby(by=None, axis=0, level=None, as_index=True, sort=True, group_keys=True, squeeze=, observed=False, dropna=True)[source]
...
If by is a function, it’s called on each value of the object’s index
QUESTION
I thought I had the answer to my question here, but when I used with my larger data set I get different results. I suspect the difference is because of the way the na.locf
line is acting.
Basically I am converting code where I used mutate_at
to the new syntax with mutate(across())
.
In the first case below, the data is filled correctly, because df_initial
is still grouped by the index_name. In the second case, I'm assuming because I had to ungroup for the mutate
across
to work, I get a different answer.
So here is another example with a larger data set to illustrate the problem.
Reproducible example:
...ANSWER
Answered 2021-Mar-04 at 00:43Both approaches gave similar results for me. Could you try the code below?
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