add more multiple columns based on value in other columns in R...

How to replicate dcast() from R in SQL Server...

Reshape data into long columns based on variable in R for IRR...

Reshape data by hour vs day, with value of a third column...

Spreading key value pairs into columns...

Applying dcast in a weird way...

dcast error: `Error in match(x, table, nomatch = 0L)`...

Using the Dcast function (reshape2) on large dataset...

R using dcast,melt and concatenation to reshape data frame...

Combine several dcast data.table (which share same key) efficiently...

why is dcast so impossible to pass a non-aggregate function?...

Extract column data on the basis of another column levels in r...

Error with large numerics in dcast.data.table...

wide format with dcast data.table...