Top "Data-science" questions

Implementation questions about data science.

How do I calculate a grouped z score in R using dplyr?

Using the iris dataset I'm trying to calculate a z score for each of the variables. I have the data …

r dplyr data-science
InvalidArgumentError: Expected dimension in the range [-1, 1) but got 1

I'm not sure what this error means. This error occurs when I try to calculate acc: acc = accuracy.eval(feed_…

python machine-learning tensorflow image-recognition data-science
How to split dataframe based on years in python?

I have a dataframe called "dataframe" that contains a bunch of information of sales on a certain date. Each date …

python pandas statistics data-science pyramid-arima
Why is the third quartile less than the mean in my data?

I loaded a data set called gob into R and tried the handy summary function. It is Note that the 3…

r data-science mean quartile