I am using the Weka GUI and imported a csv file.
I want to transform a numerical attribute to nominal with the "NumericToNominal"-filter.
There are values between "-1" and "770".
If I set the attributeIndices value to "first-30,31-100,101-150,151-last", I get the error message: "Problem filtering instances: Invalid range list at first-30".
Do you have any idea, what is wrong?
Thanks in advance
I have just used the same NumericToNominal filter because I read in a csv file from the UI and it claimed everything was numeric.
You are using the -R switch and so it is looking for the range of column numbers. The values in whatever columns should not matter. Columns begin at 1 or first as you have above. The error message you get "Invalid range list" is when you reference a column number that does not exist. Therefore, it seems to indicate that either you have less than 30 columns or one of the columns between 1 and 30 has somehow been removed.. Did you mix up column numbers with the values contained within said columns because I believe having a negative value would not be a problem for this process?
Related
I have a Feature field that has 4 different values (Features 1-4). There's also a use case field that has a set of values (usecase 1-4) and another set of values (usecase 5-8).
I would like to find the sum of (usecase1-4), that also contains feature1-2 from the Feature field. Same with (usecase5-8) that contains feature3-4.
screenshot for a visual:
enter image description here
How would I accomplish this?
I tried sumOver(sum(count, [Feature], [usecase])) but that gave me the same numbers of the total column. Am I thinking about the partitions wrong?
I'm an average user of Google sheets and I've tried writing/looking up the formula I'm going for, but I haven't had any luck yet.
I have a spreadsheet that details multiple values that I need to display in a single cell the average of a certain set of values derived from a specific set of those values from multiple columns.
The flow of information would look something along the lines of:
if value in Column D=L
then
if value in Column J<$1.20
then
Find Avg of all Values in Column N
I'd need the formula to narrow it's field of data each time so the final result was the average of all the values in Column N that had a value in column J<$1.20 with a value in Column D=L.
I feel like a dummy over here because I just can't narrow down how I should write this flow and get it to work right without adding multiple extra hidden columns. Can anyone help on this one?
I've tried writing the formula multiple different ways but haven't kept it written down to pass on.
Im working on a project and noticed a column that has a NUMBER data type specified like so:
NUMBER(22,38,18)
While I'm aware with precision and scale, I'm confused about the third number. I cant seem to find any documentation where NUMBER has a third value.
What does that 18 mean? And would a value of 1.5187000000000004 be an issue now that im seeing 3 values within the NUMBER brackets?
I'm trying to clear the entire cell if it doesn't contain a given keyword.
I've managed to do this for one column:
Table.ReplaceValue(#"PrevStep",each [#"My Column"], each if Text.PositionOf([#"My Column"],"keyword")>-1 then [#"My Column"] else null,Replacer.ReplaceValue,{"My Column"})
The problem is I need to iterate/repeat that step for a number of columns... the number of columns may vary and column names also may be different every time. I can have all those column names put into a list but I'm not able to use it.
The solution I'm looking for may look like this
for each ColNam in MyColumnsList
Table.ReplaceValue(#"PrevStep",each [#"ColNam"], each if Text.PositionOf([#"ColNam"],"keyword")>-1 then [#"ColNam"] else null,Replacer.ReplaceValue,MyColumnsList)
next
but this is not the VBA code but Power Query M - and of course the problem is with #PrevStep as I would see it like a recursions... again... do not know how to process.
Is the path I follow correct or should it be done some other way
Thanks
Andrew
Unpivot your columns to turn all the columns into two columns. Apply your replacement to the single value column then pivot it back into the original format
I am calculating sum of all sales order (by multiplying quantity and price of a sales order - assume one sale order has only one item and using the sum function) in SQL query and I am spooling the output to a CSV file by using spool C:\scripts\output.csv.
The numeric output I get is truncated/rounded e.g. the SQL output 122393446 is made available in CSV as 122400000.
I tried to google and search on stackoverflow, but I could not get any hints about what can be done to prevent this.
Any clues?
Thanks
I think it is a xls issue.
Save as xls.
format column -> number with 2 decimals for example.
Initially I thought it might have something to do with the width of the number format which normally is 10 (NUMWIDTH) in sqlplus, but your result numeric width is 9, so that can not be the problem. Please check your query if you use a numeric type that doesn't have the required precission, and thus makes inexact calculations.