I have longitudinal lab data where each person in a dataset has a line for every day they measured their A1C and uploaded it via an app. I need help identifying and extracting the first ‘valid’ week of data where the person uploaded their measurement on least 5 of 7 days in a given week. However, if they had data for 6 days or 7, I want to extract all possible measures for that week.

I create a matrix using r as follows:

I create a matrix using r as follows:

I applied two tests with completely different items to the same population. I would like to do the following test: Calibrate the parameters of the first test and use them to find the respondents’ score. Using this score, I would like to calibrate the items of the second test, but I don’t know how to do this using the mirt package in R.

I applied two tests with completely different items to the same population. I would like to do the following test: Calibrate the parameters of the first test and use them to find the respondents’ score. Using this score, I would like to calibrate the items of the second test, but I don’t know how to do this using the mirt package in R.

I applied two tests with completely different items to the same population. I would like to do the following test: Calibrate the parameters of the first test and use them to find the respondents’ score. Using this score, I would like to calibrate the items of the second test, but I don’t know how to do this using the mirt package in R.

I applied two tests with completely different items to the same population. I would like to do the following test: Calibrate the parameters of the first test and use them to find the respondents’ score. Using this score, I would like to calibrate the items of the second test, but I don’t know how to do this using the mirt package in R.

I applied two tests with completely different items to the same population. I would like to do the following test: Calibrate the parameters of the first test and use them to find the respondents’ score. Using this score, I would like to calibrate the items of the second test, but I don’t know how to do this using the mirt package in R.

I applied two tests with completely different items to the same population. I would like to do the following test: Calibrate the parameters of the first test and use them to find the respondents’ score. Using this score, I would like to calibrate the items of the second test, but I don’t know how to do this using the mirt package in R.

$begingroup$ This question was migrated from Stack Overflow because it can be answered on Cross Validated. Migrated 53 mins ago. I’m trying to analyze a dataset in R that has a lot of zeros and I’d like to include random effects in the model. The data is considered absorbance levels from Biolog Ecoplates or average […]