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rformattingscientific-notation

Control the number of decimals in scientific notation

I have a vector:

c(0, 1.23, 0.0000123)

and I would like to get scientific notation defining the number of decimals. Something like:

# [1] 0.000e+00 1.230e+00 1.230e-05

or like:

# [1] 0.000000e+00 1.230000e+00 1.230000e-05

How can I do that?

Solution

  • From my comment:

    Let 

    x <- c(0, 1.23, 0.0000123)

    and try

    sprintf("%.3e", x)
[1] "0.000e+00" "1.230e+00" "1.230e-05"

    If you don't want the quotes and the [1] to be displayed then do this

    cat(sprintf("%.3e", x),"\n")
0.000e+00 1.230e+00 1.230e-05