How can I iterate a function over specific columns of a series of dataframes where I can set the order?

I work for an insurance company and I am trying to improve something that I built. I have about 150 data frames that look like this: library(data.table) dt_Premium<-data.table(Policy = c(“Pol123″,”Pol333″,”Pol555″,”Pol999”), Base_Premium_Fire= c(45,55,105,92), Base_Premium_Water= c(20,21,24,29), Base_Premium_Theft= c(3,5,6,7)) dt_Discount_Factors<-data.table(Policy = c(“Pol123″,”Pol333″,”Pol555″,”Pol999”), Discount_Factor_Fire= c(.9,.95,.99,.97), Discount_Factor_Water= c(.8,.85,.9,.96), Discount_Factor_Theft= c(1,1,1,1)) dt_Territory_Factors<-data.table(Policy = c(“Pol123″,”Pol333″,”Pol555″,”Pol999”), Territory_Factor_Fire= c(1.9,1.2,.91,1.03), Territory_Factor_Water= c(1.03,1.3,1.25,1.01), Territory_Factor_Theft= c(1,1.5,1,.5)) dt_Fixed_Expense<-data.table(Policy…

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PyOpenCL Error when accessing result of kernel operation (RuntimeError: Unable to compute length of object)

I’m new to OpenCL implementations and trying to make a relatively simple data processing script. The script works like so: Before OpenCL side of script Load data Prepare some arrays for use in processing This is all done before the comment: ## Step #1. Obtain an OpenCL platform. OpenCL side: Acquire platform and device, and…

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Unable to run on device after migrating to AndroidX. failed for task ‘:app:mergeDebugResources’ caused by Daemon startup failed

Good day everybody, I recently migrated to AndroidX and encounter some problems. The projects builds ok, but when I try to run on device, I get the error “Process unexpectedly exit.” when running tasks. Specifically when it reach es app:MergeDebugResources This is what i get: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ‘:app:mergeDebugResources’. at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:151) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$3.accept(ExecuteActionsTaskExecuter.java:148)…

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