Control the number of decimals in scientific notation

Question

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?

[First hit on google](https://stackoverflow.com/questions/21509346/r-displays-numbers-in-scientific-notation) — Sotos, Jun 01 '17 at 07:52
The result is `[1] "0.00e+00" "1.23e+00" "1.23e-05"`. It is two decimals, I need 3 or 6 — rescribano82, Jun 01 '17 at 08:28
Let `x <- c(0, 1.23, 0.0000123)`. Then try `sprintf("%.3e", x)`. And you should get `[1] "0.000e+00" "1.230e+00" "1.230e-05"` — Bhas, Jun 01 '17 at 09:05

score 0 · Accepted Answer · answered Jun 01 '17 at 09:12

0

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

answered Jun 01 '17 at 09:12

Bhas

1 Answers1