I have a large Excel file with SKU numbers (stock keeping units) and
forecasts which can be mimicked with the following:
Period <- c(1, 2, 3, 1, 2, 3, 4, 1, 2)
SKU <- c("A1","A1","A1","X4","X4","X4","X4","K2","K2")
Forecast <- c(99, 103, 128, 63, 69, 72, 75, 207, 201)
PeriodSKUForecast <- data.frame(Period, SKU, Forecast)
PeriodSKUForecast
Period SKU Forecast
1 1 A1 99
2 2 A1 103
3 3 A1 128
4 1 X4 63
5 2 X4 69
6 3 X4 72
7 4 X4 75
8 1 K2 207
9 2 K2 201
I need to create a matrix with only the first forecast for each SKU:
A1 99
X4 63
K2 207
The Period for the first forecast will always be the minimum value
for an SKU.
Can anyone suggest how I might accomplish this?
Thank you,
--
__________________________
*Barry E. King, Ph.D.*
Director of Retail Operations
Qualex Consulting Services, Inc.
barry.k...@qlx.com
O: (317)940-5464
M: (317)507-0661
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