mincer | Sprockets inspired web assets compiler for Node.js
kandi X-RAY | mincer Summary
kandi X-RAY | mincer Summary
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QUESTION
I'm performing a Mincer Zarnowitz to test the goodness of fit of a time series regression. The test (https://eranraviv.com/volatility-forecast-evaluation-in-r/) boils down to, first, running a regression of the observations on the fitted values, and second, a joint test that the intercept of the regression is 0, and the coefficient of the fitted values is 1.
I attached the first 20 observations of my vectors of observations (obs
) and fitted values (fit
) - it gives the same error with the whole dataset. Using R
, I first run the regression (MZ2
) of obs
on fit
, and save it. Then I use the linearHypothesis
function in the package car
to test the joint hypotheses above. The rank of the matrix (MZ2$model
) is maximal (2), so the matrix is invertible. Yet I receive the error Error in solve.default(vcov.hyp) : system is computationally singular: reciprocal condition number = 6.22676e-17
. The code runs for the single hypothesis test.
I don't understand why I get this error. The summary vcov
option should have returned the same error to compute the asymptotic (robust) standard errors, but it doesn't.
Any idea on this error? Thank you.
...ANSWER
Answered 2020-Apr-07 at 18:56Your values are quite huge, so when it needs to calculate the RSS (where you square the residuals) or refit the model, at some point the numbers might be too large for the machine. It is similar to something discussed here
Ideally, you go back to the linear model that gives that gives you the prediction, and scale your dependent variable, for example divide by 1e3 or 1e6.
What you have now, you can do (and test the joint hypo):
QUESTION
I'm trying to push tutorial blog rails (5.2.1) app to heroku. I've checked all similar questions on SO and haven't found the answer. The errors I'm getting are:
...ANSWER
Answered 2020-Feb-21 at 22:20Per the documentation from bootstrap-mincer:
QUESTION
This is what my output currently looks like (which is not how I want it) and what the correct output should look like -
I want my program that I am currently making take the inputs from 2 .txt files and then put them into 1 output .txt file but the output has to look something like this
For example, if the two input files contents were: “Now is the time.” “For the quick brown fox.” Then my output line would be: “Now foR Is thE quick Time browN fox.”
The program should also capitalize the first letter of each word from the first file and the last letter of each word from the second file until I exhaust one line then transfers all remaining words from the longer line to my output file unchanged. At the end of each set of lines end with a period and write a line to the output file like seen above
My current code in c is as follows:
...ANSWER
Answered 2018-Nov-15 at 08:54This loop may do what you want. Sorry, can't test the code.
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include postcss >= 4.1
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