[R] inverse function of melt

Steven McKinney smckinney at bccrc.ca
Fri Jun 18 19:46:41 CEST 2010


A reproducible example would get you more feedback.

Steven McKinney

From: r-help-bounces at r-project.org [r-help-bounces at r-project.org] On Behalf Of n.vialma at libero.it [n.vialma at libero.it]
Sent: June 18, 2010 6:39 AM
To: r-help at r-project.org
Subject: [R] inverse function of melt

Dear list,
I'm looking for an inverse function of melt(which is in package reshape).Namely, I had a data frame like this

1995      7           3         45

1996       5         6            32

1997       6          10         15
I transformed my data by using the melt function and my data was reshaped in the following format:

YEAR    variable          value

1995        VAR1              7

1996         VAR1             5

1997         VAR1             6
1995        VAR2              7

1996         VAR2             5

1997         VAR2             6
1995        VAR3              7

1996         VAR3             5

1997         VAR3             6

 Now I would like to come back to the original format, namely table1.
Anyone could help me??
Thanks for your attention!

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