Recent content by Frank Einstein

Hello everyone. I have a pandas dataset in python which has n+1 columns and t rows. The first column is a timestamp that goes second by second during a time interval, and the other columns are the names of the people who log in the server. The t rows of the other columns indicate if the person...

The code doesn't seem to work since it never returns a feasible solution, it doesn't matter hoy much extra iterations I add. That is why I came here to ask if someone could propose an alternative method. Shoul I delete the post?

I have a matrix of dimension 56*56, each row and column represent the compatibility of one person with the rest of the people. A sample matrix could be Alejandro Ana Beatriz Jose Juan Luz Maria Ruben...

Thanks for the answer

Hello everyone. I have four thermometers which measure the temperature in four different positions. The data is distributed as a matrix, where each column is a sensor, and each row is a measurement. All measurements are made at exactly the same times, one measurement each hour. I have...

Thanks. I can calculate them with ease as well.

Hello everyone. I have a machine with a series of sensors. All sensors send a signal each minute. I want to know if any of those sensors are redundant. The data is available as an Excel file, where the columns are the variables and the rows are the measurements. I have 1000 rows. To do this, I...

Thanks for the answer. I will try to understand it. However, could you please explain to me how to construct the function $f$? Best regards.

TL;DR Summary: I want to find a function with f'>0, f''<0 and takes the values 2, 2^2, 2^3, 2^4,..., 2^n Hello everyone. A professor explained the St. Petersburgh paradox in class and the concept of utility function U used to explain why someone won't play a betting game with an infinite...

Hello everyone. I am trying to construct a functioning version of randomfields (specifically 2D_karhunen_loeve_identification_example.py) in Matlab. For that, I have to calculate the Karhunen-Loève expansion of 2D data, since this is what it says in the documentation. I also have some sample...

I am following this thread. I have 50 wind predictions, each measured at 200k places, thus, each wind prediction is a realization of a random variable. I don't know if that helps

Yes, I have 50 realizations of a stochastic process, 50 valriables and 200k observations of each. I am trying to calculate the covariance between the windspeed in the X and Y directions using data from the ECMWF. I gess I will have to limit the region or the resolution. Thanks anyway for your...

Hello everyone. I want to calculate the covariance matrix of a stochastic process using Matlab as cov(listOfUVValues) being the dimensions of listOfUVValues 211302*50. I get the following error: Requested 211302x211302 (332.7GB) array exceeds maximum array size preference. Creation of...

Thanks.

So, if I understand you correctly, I have to manually derivate atan2(√ζ, √1-ζ) respect to φ and then respect to λ and then substitute the values in the point as phiStdA=6.608673643811970e-08 phiStdB=7.548195779015499e-08 lambdaStdA= 7.757704741906700e-09 lambdaStdB=9.494186140546169e-09...