Crystal report dynamic formula name - crystal-reports

Here is what I have. I have 15 unique formulas named Week1, Week2, ... Week15. I would like to be able to take a parameter name, MYCount, and use that to loop through the records and sum them. So if MyCount is equal to 3, the loop would sum Week1 + Week2 + Week3. I know how to create a loop, but I cannot figure out how to build the formula name dynamically. Here is what I have so far: (I am using Crystal Xi)
Whileprintingrecords;
local NumberVar i := {?MyCount}
For i := 1 To (MyCount-1) Do (
i = {#Week & "i"} + i
);
x

I think you may be over complicating. Why not just do:
Local numbervar x := 0;
If param > 0 then
X := x + week1;
If param > 1 then
X := x + week;
And so on...
X;

I don't exactly what you are trying to do, but you may want to consider another approach.
Create a formula that will segment a field based on a date field's week number:
//{#amount}
// adjust firstDayOfWeek and firstDayOfYear parameters to match your organization's
// definition of a week
If DatePart("ww", {table.dateField})<={?Week} Then
{table.amount}
Insert a summarized field on the formula field.

If you are using your #Weekn formula fields so that you can summarise by date across the page, then have you considered using Crystal's Crosstab functionality instead?

Related

Crystal Reports 13 Standard Deviation with formula fields

I've been working on a report made by someone else which uses the StDev function. I thought it would be simple enough, but the data can contain multiple values for each record, so there are if statements used to determine which value to take from each record. I've exported a table to Excel which contains one value per record (the one that should be used in the StDev), and then calculated the SD there to provide a check.
The report and Excel are giving me very different values :(
So, I'm going back to the report and using some additional formula fields to calculate the SD longhand to act as a kind of deciding vote (fingers crossed it doesn't produce a third set of values...).
I've worked out the syntax errors, but am still getting a run-time error - "Division by zero" which then highlights the section of code indicated below...
My formula fields are:
{#StDevArrayPopulate} - in the details section
NumberVar Array varStDevArray;
NumberVar varStDevArrayCount;
varStDevArray [varStDevArrayCount] := {ValueToSummarise};
varStDevArrayCount := varStDevArrayCount + 1;
{#StDevArrayCalculate} - in the group footer
NumberVar Array varStDevArray;
NumberVar varCounter :=1;
NumberVar varMean := 0;
NumberVar varStDev := 0;
NumberVar varStDevArrayCount;
// START OF MEAN
// Sum of all of the values in the array
for varCounter:= 1 to varStDevArrayCount step 1 do
(
varMean := varMean + varStDevArray [varStDevArrayCount];
);
// Divide by the total number of values in the array
varMean := varMean / varStDevArrayCount; // !! This is the line that highlights after the error message !!
// END OF MEAN
// START OF STANDARD DEVIATION
// Subtract the mean from each value in the array and square the result
for varCounter := 1 to varStDevArrayCount step 1 do
(
varStDevArray[varStDevArrayCount] := (varStDevArray [varStDevArrayCount] - varMean) * (varStDevArray [varStDevArrayCount] - varMean);
);
// Sum of all of the values in the array
for varCounter:= 1 to varStDevArrayCount step 1 do
(
varStDev := varStDev + varStDevArray [varStDevArrayCount];
);
// Divide by the total number of values in the array
varStDev := varStDev / varStDevArrayCount;
// Square root of mean of differences
varStDev := Sqr(varStDev)
// END OF STANDARD DEVIATION
{#StDevArrayCalculate} - in the group footer
NumberVar varMean;
NumberVar varStDev;
"The mean is " & varMean & ", and the standard deviation is " & varStDev & "."
I've tried using a Running Total field but that was giving errors as it need to be count the first record before the Populate formula field ran. I've also tried adding a fourth field to the header, which initialises the varStDevArrayCount as 1.
Does anyone have any suggestions?
Looks like there are no detail records hence you are getting zero in array... I don't think initializing with 1 will make any difference instead make a small change like below and check.
if varStDevArrayCount=0
then
varMean :=varMean
else
varMean := varMean / varStDevArrayCount;
I would advice you to just check records in detail and then debug

Crystal reports formula using variables

I need a formula like this:
if {#TarSale_TimeWise}= 0 or isnull({#TarSale_TimeWise}) then '-'
else
totext(round(({#ActSale_TimeWise}-{#TarSale_TimeWise})/{#TarSale_TimeWise}*100,1),1)
Here the formula for {#TarSale_TimeWise} is
round({CatTimeWise.tarSale},1)
Similarly the formula for {#ActSale_TimeWise} is
round({CatTimeWise.ActSale},1)
I need to take rounding as 1 for both the fields and then I need to do the calculation for var sale with values round as 1 for both the formulas.
Now instead of creating this below 2 formulas and using those in 3rd formula I want to create only one formula using variables.
How can I modify above formulas as 1 formula?
Create only one formula and write below code:
Local Numbervar a1:=round({CatTimeWise.tarSale},1) ;
Local NumberVar a2:=round({CatTimeWise.ActSale},1) ;
if a1= 0 or isnull(a1) then '-'
else
totext(round((a2-a1)/a1*100,1),1)
Try:
If Isnull({CatTimeWise.tarSale}) Or {CatTimeWise.tarSale}=0 Then
'-'
Else
ToText( Round( (({CatTimeWise.ActSale} - {CatTimeWise.tarSale}) / {CatTimeWise.tarSale}*100), 1), 1 )

Sumifs in Crystal

I'm working on a database that basically looks like this (in its simplest form):
{Phase} {Code} {Qty}
Example:
{Qty} for {Phase}="R" and {Code}="Nat" = 0
{Qty} for {Phase}="F" and {Code}="Nat" = 5
{Qty} for {Phase}="R" and {Code}="Int" = 10
{Qty} for {Phase}="F" and {Code}="Int" = 15
I am trying to get a result to show me the Qty for phase "R" and Code "Nat" (where R is <> 0) otherwise give me the qty for phase "F". So for the above example I would get an answer = 5 for Nat (because qty for phase R is 0) and an answer of 10 where the code is Int (because qty for phase R <> 0)
I have used three formula fields to do this:
1: if ({PHASE}="F" and {CODE}="NAT") then {QTY} else 0
2: if ({PHASE}="R" and {Code}="NAT") then {QTY} else 0
3: if {2} = 0 then {1} else {2}
Formula fields 1 & 2 come up with the correct amounts. However formula field {3} returns both phases. For example Code "Int" Phase "R" shows as qty = 25 instead of qty = 10.
How do I get around this?
You need to group by {table.code} because this is not a one-row calculation, but needs to be a calculation over each code for 2+ phases (meaning 2+ rows of data).
Create a formula with two variables that will store the values of each phase, F and R. This formula needs to go in the Details section of the report.
whileprintingrecords;
numbervar Fqty;
numbervar Rqty;
if {table.phase}="F" then Fqty:={table.qty}
else Rqty:={table.qty};
Now, in the group footer, you can reference both quantity values via the variables.
whileprintingrecords;
numbervar Fqty;
numbervar Rqty;
if Fqty=0 then Rqty else Fqty
And you're done. Don't forget to reset the two variables in the group header so you don't carry the quantity over between different codes.

Crystal summary and percents

I have a Crystal Report v 9.2.2 and I have three summaries at the end of each group; count of IEP students, count of non-IEP students, and total number of students. For an example, for one group (a class) I have 25 students. 4 Students are IEP, 21 are non-IEP. So I tried to create a formula to calculate the percentages, but the percents are wrong.
sum({#IEP}) % count({Mytable.student_id})
Manually, the math says 4 / 25 * 100 = 16, but when I use the formula above I get 11
I don't think it's a formatting problem.
Check reset value in "Create running Total Field" for the count.
Or
reset the count in the formula.
Your math is right, just do the same thing in the code/formula. The following works for a group based on {YourGroupField} and gives the percentage to one decimal point:
local numbervar IEPstudents := sum({#IEP},{YourGroupField}) //get number of IEP students in group
local numbervar TotalStudents := count({Mytable.student_id},{YourGroupField}) //get total students in group
local numbervar ThePercent := (IEPstudents / TotalStudents) * 100;
totext(ThePercent,1) + '%'
Alternatively, you can keep the formula numeric and add the percent symbol and formatting in the field's format editor.

Crystal Report formula field formula that pulls a date out of a string?

I need to extract a date out of a invoice number and subtract one month from the month.
For example if a invoice number is I2011101002683 I need to pull out the 2011, four numbers starting a position 1, and then the 10, two numbers starting a position 5.
and display the date in a 2011/09 format. Thanks in advance.
One way:
numbervar year_start := 2;
numbervar year_len := 4;
numbervar month_start := year_start + year_len;
numbervar month_len:= 2;
mid({Command.InvoiceNumber},year_start,year_len) + "/" +
mid({Command.InvoiceNumber},month_start,month_len);
Create a formula field to extract the date:
//{#invoice_date}
//I|2011|10|1002683 --> Date(2011, 10, 1)
Date(ToNumber({Command.InvoiceNumber}[2 To 5]), ToNumber({Command.InvoiceNumber}[6 to 7]), 1)
Add the resulting formula to the canvas; format it as desired.