How can I count the number of repeats in a list of data?
 

I am trying to determine when I have repeats in a list of data. This is the
situation:

I have a list of data that contains numbers 1-99. I am trying to determine
when the numbers 1 and 2 appear in the same list and then count those
occurences. I have found a round about way of doing it, but do you know of a
faster way? Any help would be greatly appreciated. Thank you.

How can I count the number of repeats in a list of data?
 

=Countif(A:A,1) will count number of 1s in column A

HTH

"SouthCarolina" wrote:

I am trying to determine when I have repeats in a list of data. This is the
situation:

I have a list of data that contains numbers 1-99. I am trying to determine
when the numbers 1 and 2 appear in the same list and then count those
occurences. I have found a round about way of doing it, but do you know of a
faster way? Any help would be greatly appreciated. Thank you.

How can I count the number of repeats in a list of data?
 

Thank you for your help. I can count the number of times the number 1
appears in the column with no problem. My problems start when I try to count
the number of 1's and 2's that occur simultaneously. I will continue to work
at it.

"Toppers" wrote:

=Countif(A:A,1) will count number of 1s in column A

HTH

"SouthCarolina" wrote:

I am trying to determine when I have repeats in a list of data. This is the
situation:

I have a list of data that contains numbers 1-99. I am trying to determine
when the numbers 1 and 2 appear in the same list and then count those
occurences. I have found a round about way of doing it, but do you know of a
faster way? Any help would be greatly appreciated. Thank you.

How can I count the number of repeats in a list of data?
 

If the 1s and 2s are independent , then is not simply:

=Countif(A:A,1)+countif(A:A,2)

OR

=if(and(countif(A:A,1)0,countif(A:A,2)0),"both occur","only one or none
occur")

Or have I completely missed the point (again!)

"SouthCarolina" wrote:

Thank you for your help. I can count the number of times the number 1
appears in the column with no problem. My problems start when I try to count
the number of 1's and 2's that occur simultaneously. I will continue to work
at it.

"Toppers" wrote:

=Countif(A:A,1) will count number of 1s in column A

HTH

"SouthCarolina" wrote:

I am trying to determine when I have repeats in a list of data. This is the
situation:

I have a list of data that contains numbers 1-99. I am trying to determine
when the numbers 1 and 2 appear in the same list and then count those
occurences. I have found a round about way of doing it, but do you know of a
faster way? Any help would be greatly appreciated. Thank you.

How can I count the number of repeats in a list of data?
 

Sorry for not making this clear the first time, but the 1's and 2's are
dependent upon one another. I am trying to track the frequency of a set of
machines being off-line. For example, I am trying to determine when machines
1 and 2 were offline at the same time. I hope this clears up any confusion.
I am sorry that I was not clearer the first time.

"Toppers" wrote:

If the 1s and 2s are independent , then is not simply:

=Countif(A:A,1)+countif(A:A,2)

OR

=if(and(countif(A:A,1)0,countif(A:A,2)0),"both occur","only one or none
occur")

Or have I completely missed the point (again!)

"SouthCarolina" wrote:

Thank you for your help. I can count the number of times the number 1
appears in the column with no problem. My problems start when I try to count
the number of 1's and 2's that occur simultaneously. I will continue to work
at it.

"Toppers" wrote:

=Countif(A:A,1) will count number of 1s in column A

HTH

"SouthCarolina" wrote:

I am trying to determine when I have repeats in a list of data. This is the
situation:

I have a list of data that contains numbers 1-99. I am trying to determine
when the numbers 1 and 2 appear in the same list and then count those
occurences. I have found a round about way of doing it, but do you know of a
faster way? Any help would be greatly appreciated. Thank you.

How can I count the number of repeats in a list of data?
 

Then you probably need something like:

=SUMPRODUCT((A1:A100=1)*(B1:B100=2))

HTH
Kostis Vezerides

How can I count the number of repeats in a list of data?
 

I do that and I get a "#VALUE" error. Any suggestions.

"vezerid" wrote:

Then you probably need something like:

=SUMPRODUCT((A1:A100=1)*(B1:B100=2))

HTH
Kostis Vezerides

How can I count the number of repeats in a list of data?
 

Try:

=SUMPRODUCT(--(A1:A100=1),--(B1:B100=2))

"SouthCarolina" wrote:

I do that and I get a "#VALUE" error. Any suggestions.

"vezerid" wrote:

Then you probably need something like:

=SUMPRODUCT((A1:A100=1)*(B1:B100=2))

HTH
Kostis Vezerides