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evaluation - Terms of a sum in a R expression

Given a R expression which represents a sum of terms like expr <- expression(a + b * c + d + e * f) ... g., using call_tree of the pryr package? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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evaluation - In R, evaluate expressions within vector of strings

I wish to evaluate a vector of strings containing arithmetic expressions -- "1+2", "5*6", etc. I know ... # wrong! evaluates only last element See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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