topic Re: Get first service date in SAS Procedures

Get first service date

Beto16 — Thu, 17 Mar 2016 20:55:25 GMT

hi I have a question on a request that came in...

i have a table that has data that looks like this

Machine. Date. Load. Differ

a1. 02/01/16. 160. 140

a1. 02/06/16. 40. 120

i need to get the first load 160 and last differ 120 to get % usage

sometimes the load might be pervious month because they get service monthly so I would need to get load of pervious month

machine. date. Load. Differ

a2 01/25/16. 160. 80

a2. 02/06/16. 40. 120

Re: Get first service date

Reeza — Thu, 17 Mar 2016 20:57:50 GMT

1. What do you want as your output?

2. Please post some more data and examples. I have a feeling your situation is a bit more complex and we're missing details.

Re: Get first service date

Beto16 — Thu, 17 Mar 2016 21:03:38 GMT

Machine. Date. Load. Differ
a1. 02/01/16. 160. 140
a1. 02/08/16. 40. 120

out put

machine. Date. Load. Differ

a1. 2/08/16. 160. 120

the latest date overrides the earliest but I need the load amt of 160 and the latest 120

i need to get the first load 160 and last differ 120 to get % usage
sometimes the load might be pervious month because they get service monthly so I would need to get load of pervious month

machine. date. Load. Differ
a2 01/25/16. 160. 80
a2. 02/06/16. 40. 100

out put
machine. Date. Load. Differ
a1. 2/06/16. 160. 100

Re: Get first service date

ballardw — Thu, 17 Mar 2016 21:54:20 GMT

Are the dates SAS date value numerics or character?

Do you have any rules about something like a second load 160 appearing before a 120? Or extremely long gaps between the two, say 3 months?

Re: Get first service date

Beto16 — Thu, 17 Mar 2016 23:58:13 GMT

The date is numerical ....what is happening the machine was max loaded at 160. It was reduced 40 ..... So when I try to get percentage of usage it would show a negative I was advised not to use the load of 40 but previous load which would be 160 so my percentage of usage would not be negative .... For example if load on 01/01/16. On machine S1. Was max loaded at 160 and only 60was used differ is 100so on 01/08/16 on machine S1 the load is 40 but it's carrying amt of 100from first load To get usage 100/40 would be in negative if I can use the load on 01/01/16 the load of 160 with 100 +40 140/160 ....