I have a Table called Records with the following four columns:
ID | StartChainage | EndChainage | DistanceTraveled
The DistanceTraveled is the difference between EndChainage and StartChainage. For each new record, the StartChainage should be equal to the EndChainage of the previous one.
I have created a Form called Record1 where I can only add values in the field called EndChainage, while in the field StartChainage I use the following expression:
=IIf([ID]=1,0,DLookUp("[EndChainage]","Record","[ID]=Forms![Record1]![ID]-1"))
Where I actually say that for the first record in the Table "Records" (i.e. ID=1) the value in the StartChainage must be 0, else it should obtain the value of the EndChainage field of the previous record.
This works fine and I have a Form with fields where I only input the value of the EndChainage and the Form sets the value of the StartChainage for the next record and it also calculates the DistanceTraveled.
The problem is that the calculated fields are NOT updating the relevant fields of the Table. In the Table the only updated fields are the EndChainage ones, i.e. the ones I only type manually the values.
How can I make the Table to get automatically updated by the calculated fields of the Form?
Maybe I could use calculated fields in the Table itself, but this is not what I really want.
Try with:
=IIf([ID]=1,0,DLookUp("[EndChainage]","Record","[ID]=" & Forms![Record1]![ID]-1 & ""))
Check if you get the ID:
=Forms![Record1]![ID]-1
Related
I have a parameter 'type' in a table and it can have multiple values as follows -
human
chimpanzee
orangutan
I have 3 columns related to each type in the table -
human_avg_height, human_avg_weight, human_avg_lifespan
chimpanzee_avg_height, chimpanzee_avg_weight, chimpanzee_avg_lifespan
orangutan_avg_height, orangutan_avg_weight, orangutan_avg_lifespan
So if i select the type as human, the quicksight dashboard should only display the three columns -
human_avg_height, human_avg_weight, human_avg_lifespan
and should not display the following columns -
chimpanzee_avg_height, chimpanzee_avg_weight, chimpanzee_avg_lifespan
orangutan_avg_height, orangutan_avg_weight, orangutan_avg_lifespan
I created the parameter type and in the add calculated fields I am trying to use ifelse to select the columns based on the parameter selected as follows -
ifelse(${type}='human',{human_avg_height}, {human_avg_weight}, {human_avg_lifespan},{function})
I also tried -
ifelse(${type}='human',{{human_avg_height}, {human_avg_weight}, {human_avg_lifespan},{function}})
And -
ifelse(${type}='human',{human_avg_height, human_avg_weight, human_avg_lifespan},{function}})
But none of it is working. What am i doing wrong ?
One way to do this would be to use three different calculated fields, one for all the heights, one for weights and one for lifespan. The heights one would look like this:
ifelse(
${type}='human',{human_avg_height}, ifelse(
${type}='chimpanzee', { chimpanzee_avg_height}, ifelse(
${type}='orangutan',{ orangutan_avg_height},
NULL
)))
Make another calculated field for weights and lifespan and then add these calculated fields to your table, and filter by type.
To make it clear to the viewer what data is present, edit the Title of the visual to include the type:
${type} Data
You have to create one calculated field for each measure using the ifelse with the type to choose the correct vale, but is not necessary to create inner ifelse as skabo did, the if else syntax is ifelse(if, then [, if, then ...], else) so you can define the calculated fields as follows:
avg_height = ifelse(${type}='human', {human_avg_height}, ${type}='chimpanzee', {chimpanzee_avg_height},${type}='orangutan', {orangutan_avg_height}, NULL)
avg_weight = ifelse(${type}='human', {human_avg_weight}, ${type}='chimpanzee', {chimpanzee_avg_weight},${type}='orangutan', {orangutan_avg_weight}, NULL)
avg_lifespan = ifelse(${type}='human', {human_avg_lifespan}, ${type}='chimpanzee', {chimpanzee_avg_lifespan},${type}='orangutan', {orangutan_avg_lifespan}, NULL)
Then use those calculated fields in your visuals.
I'm learning about Power Builder, and i don't know how to use these, (DWitemstatus, getnextmodified, modifiedcount, getitemstatus, NotModified!, DataModified!, New!, NewModified!)
please help me.
Thanks for read !
These relate to the status of rows in a datawindow. Generally the rows are retrieved from a database but this doesn't always have to be the case - data can be imported from a text file, XML, JSON, etc. as well.
DWItemstatus - these values are constants and describe how the data would be changed in the database.
Values are:
NotModified! - data unchanged since retrieved
DataModified! - data in one or more columns has changed
New! - row is new but no values have been assigned
NewModifed! - row is new and at least one value has been assigned to a column.
So in terms of SQL, a row which is not modified would not generate any SQL to the DBMS. A DataModified row would typically generate an UPDATE statement. New and NewModifed would typically generate INSERT statements.
GetNextModifed is a method to search a set of rows in a datawindow to find the modified rows within that set. The method takes a buffer parameter and a row parameter. The datawindow buffers are Primary!, Filter!, and Delete!. In general you would only look at the Primary buffer.
ModifedCount is a method to determine the number of rows which have been modifed in a datawindow. Note that deleting a row is not considered a modification. To find the number of rows deleted use the DeletedCount method.
GetItemStatus is a method to get the status of column within a row in a data set in a datawindow. It takes the parameters row, column (name or number), and DWBuffer.
So now an example of using this:
// loop through rows checking for changes
IF dw_dash.Modifiedcount() > 0 THEN
ll = dw_dash.GetNextModified(0,Primary!)
ldw = dw_dash
DO WHILE ll > 0
// watch value changed
IF ldw.GetItemStatus(ll,'watch',Primary!) = DataModified! THEN
event we_post_item(ll, 'watch', ldw)
END IF
// followup value changed
IF ldw.GetItemStatus(ll,'followupdate',Primary!) = DataModified! THEN
event we_post_item(ll, 'followupdate', ldw)
END IF
ll = ldw.GetNextModified(ll,Primary!)
LOOP
ldw.resetupdate() //reset the modifed flags
END IF
In this example we first check to see if any row in the datawindow has been modified. Then we get the first modified row and check if either the 'watch' or 'followupdate' columns were changed. If they were we trigger an event to do something. We then loop to the next modified row and so on. Finally we reset the modified flags so the row would now show as not being mofified.
I have a requirement to add a input field in column header, the requirement is, upon checking some checkbox's(rows) of jqgrid user can simply type text value in a input field in column header which will be automatically populated to all its cell values below this column. Basically this will eliminate user's effort of entering values in each cell of that column.
Example: if i enter VICTE in column header then all the below cell values of that column should be auto populated with that VICTE value.
So how can i add a input field in column header ?
In colNames array you can put any valid html content including input fields. After that it is easy to bind any event you want knowing the id of the input fields. By example you can write
$("#grid").jqGrid({
...
colNames : ['ShipName',...,'<input id="id1" type="text">',...]
...
});
In my webix datatable, I am showing multiple values in the cells for some columns.
To identify which values belong to which header, I have separated the column headers by a '|' (pipe) and similarly the values under them as well.
Now, in place of delimiting the columns by '|' , I need to split the columns into some editable columns with the same name.
Please refer to this snippet : https://webix.com/snippet/8ce1148e
In this above snippet, for example the Scores column will be split into two more editable columns as Rank and Vote. Similarly for Place column into Type and Name.
How the values of the first array elements is shown under each of them will remain as is.
How can this be done ?
Thanks
While creating the column configuration for webix, you can provide array to the header field for the first column along with the colspan like below:
var columns = [];
columns[0] =
{"id":"From", "header":[{"text":"Date","colspan":2},{"text":"From"}]};
columns[1] =
{"id":"To","header":[null, {"text":"To"}]};
column[0] will create Date and From and column[1] will be creating the To.
I'm trying to make a Calculated Value Control expression on the below columns:
Row Count | Date | Value
What I want to get is the Value for the 'newest' date, which will also be the highest row count. How can I write an expression to get this, it seems like it ought to be simple. I'm having trouble writing it in only expression language, without SQL.
Using the expression below you can limit the records in your table to those with the highest (aka most recent) date which should have your Value of interest.
[Date] = Max([Date])
You can do the same with row count since you mentioned the record of interest being the highest row count:
[Row Count] = Max([Row Count])
If you're looking to create a calculated column you can use a case statement to spit out the value:
case when [Date] = Max([Date]) then [Value] end
Lastly, should you want to display this value in a Text Area to show off your value you can utilize the calculated column above:
1) Create a new Text Area
2) Type some text about what it is: "Value for newest Date: " (optional)
3) Click "Insert Dynamic Item" -> "Calculated Value"
4) Under "Data" ensure the appropriate data table is selected. Note: You can uncheck the "Use Current Filtering..." box here if you do not want your value to update as you filter.
5) Under Values, utilize our calculated column with "Max" wrapped around it to avoid Summing duplicate values:
Max(CALCULATED_COLUMN)
Here is a screenshot of my work with random filler dates and values: http://i.imgur.com/hFapS8c.png
The larger text is to show the calculated value dynamic items. I used Max([Date]) for the date value.