The list starts empty. Then I want to append an value to it for each iteration in a loop if certain condition is met. I don't see append option in Variable Operation.
You can use string split for this, assuming you know of a delimiter that won't ever be in your list of values. I've used a semi-colon, and $local_joinedList$ starts off empty.
If (certain condition is met)
Variable Operation: $local_joinedList$;$local_newValue$ To $local_joinedList$
End If
String Operation: Split "$local_joinedList$" with delimiter ";" and assign output to $my-list-variable$
This overwrites $my-list-variable$.
If you need to append to an existing list, you can do it the same way by using String Join first, append your values to the string, then split it again afterward.
String Operation: Join elements of "$my-list-variable$" by delimiter ";" and assign output to $local_joinedList$
Lists are buggy in Automation Anywhere and have been buggy for several versions. I suggest not using them and instead use XML.
It it a much more versatile approach and allows you to do much more that with lists. You can search, filter, insert, delete etc.
For the example you mention, you would use the "Insert Node" command.
Throwing in my 2 cents as well - my-list-variable appears to be the only mutable in size list you can work with. From my experience with 10.7, it only grows though.
So if you made a list with 60 values, and you wanted to use my-list-variable again for 55, you'll need to clear out those remaining 5 values and create an if condition when looping over the list to ensure the values are not whatever you set those 5 values to be.
I used lime's answer as a reference (thanks lime!) to populate a list variable from some data in an Excel spreadsheet.
Here's my automation for it:
Related
I'm trying to clear an array after each iteration of a for loop in LabVIEW, but the way I've implemented it has the values not going directly to what I want, but it changes with previous values in other parts of the array.
It isn't shown, but this code is inside of a for-loop that iterates through another numeric array.
I know that if I get the array to clear properly after each loop iteration, this should work. How do I do that? I'm a beginner at Labview but have been coding for awhile - help is appreciated!!!
[![labview add to array][2]][2]
It looks as if you're not quite used to how LabVIEW passes data around yet. There's no need to use lots of value property nodes for the same control or indicator within one structure; if you want to use the same data in more than one place, just branch the wire. Perhaps you're thinking that a LabVIEW control or indicator is equivalent to a variable in text languages, and you need to use a property node to get or set it. Instead, think of the wire as the variable. If you want to pass the output of one operation to the input of another, just wire the output to the input.
The indicators with terminals inside your loop will be updated with new values every loop iteration, and the code inside the loop should execute faster than a human can read those values, so once the loop has finished all the outputs except the final values will be lost. Is that what you intended, or do you want to accumulate or store them in some way?
I can see that in each loop iteration you're reading two values from a config file, and the section is specified by the string value of one element of the numeric array Array. You're displaying the two values in the indicators PICKERING and SUBUNIT. If you can describe in words (or pseudocode, or a text language you're used to) what manipulation of data you're actually trying to do in the rest of this code, we may be able to make more specific suggestions.
First of all, I'm assuming that the desired order of operations is the following:
Putting the value of Pickering into Array 2
Extracting from Array 2 the values to put in Pickering 1 and Pickering 2
Putting Array 2 back to its original value
If this is the case, with your current code you can't be sure that operation 1 will be executed be fore operation 2. In fact, the order of these operations can't be pre-determined. You must force the dataflow, for example by creating a sequence structure. You will put the code related to 1 in the first frame, then code related to operation 2 in the second.
Then, to put Array 2 back to it's original value I would add a third frame, where you force an empty array into the Value property node of Array 2 (the tool you use for pickering, but as input and not as output).
The sequence structure has to be inside the for loop.
I have never used the property node Reinit to default, so I can't help you with that.
Unfortunately I can't run Labview on this PC but I hope my explanation was clear enough, if not tell me and I will try to be more specific.
I would like to split my Variables "Wellbeing_Pre" and "Wellbeing_Post" to one Wellbeing variable and one Pre/Post-Variable, so that I have one row for each pre and post and one column for the variable "wellbeing" and one for the variable "Pre / Post" (0=pre, 1=post).
I have already a long-format in my data where there are several rows for each person for every measurment point. Now I would like to split the Pre Post Measurments to separate rows as well.
I'm grateful for ideas! :-)
To elaborate #horace_vr's solution:
varstocases make Wellbeing from Wellbeing_Pre Wellbeing_Post /index=PPtxt(Wellbeing).
* variable PPtxt now has the values "Wellbeing_Pre" and "Wellbeing_Post".
* If you want a numeric 1/0 variable instead, do the following.
recode PPtxt ("Wellbeing_Pre"=0) ("Wellbeing_Post"=1) into Pre_Post.
exe.
I have a column with values that are duplicated e.g.
VMS5796,VMS5650,VMS5650,CSL,VMA5216,CSL,VMA5113
I'm applying a transform using jython that removes the duplicates (On error is set to keep original), here's the code:
return list(set(value.split(",")))
Which works in the preview, but isn't getting applied to the column. What am I doing wrong?
The Map function is very powerful and an underused function in Python / Jython. It probably is unclear what this code does internally, but it is extremely fast in processing millions of bits of values from a list or array in your columns cells' values that need to be 'mapped' as a string type and then applying a join with a separator char such as a comma ', '
deduped_list = list(set(value.split(",")))
return ', '.join(map(str, deduped_list))
There are probably other, even slightly faster variations than this, but this should get you going in the right direction.
Interestingly, you can also get the 'printable representation' repr(object) which is acceptable to an EVAL like OpenRefine's and can be useful for seeing the representation of your values as well..., which I just found out about, researching this answer in more depth for you.
deduped_list = list(set(value.split(",")))
return ', '.join(map(repr, deduped_list))
Preview implicitly formats things for display. Your expression returns an array (which can't be stored in a cell), so if you'd like to get it string form, tack a .join(',') on the end.
myRs=myStmt.executeQuery("select i_col,col_name from tab_col")
i=0
while (myRs.next()):
list= myRs.getString("I_COL")+','+myRs.getString("COL_NAME")
i have a jython code to run a sql statement i want to store all the row of the sql into a single variable. I used to list to store the value but its always storing only the single line , so is there is way to append all the rows and keep adding to single variable.
Thanks so much for your help.
With that code you overwrite the "list" variable in every iteration of the while loop (= is an assignment), try something like this (I used rs rather than list to avoid a name clash with the builtin function list()):
myRs=myStmt.executeQuery("select i_col,col_name from tab_col")
rs=[]
i=0
while (myRs.next()):
rs.append(myRs.getString("I_COL")+','+myRs.getString("COL_NAME"))
i have a string that looks like this
"apples,fish,oranges,bananas,fish"
i want to be able to sort this list and get only the uniques. how do i do it in vb.net? please provide code
A lot of your questions are quite basic, so rather than providing the code I'm going to provide the thought process and let you learn from implementing it.
Firstly, you have a string that contains multiple items separated by commas, so you're going to need to split the string at the commas to get a list. You can use String.Split for that.
You can then use some of the extension methods for IEnumerable<T> to filter and order the list. The ones to look at are Enumerable.Distinct and Enumerable.OrderBy. You can either write these as normal methods, or use Linq syntax.
If you need to get it back into a comma-separated string, then you'll need to re-join the strings using the String.Join method. Note that this needs an array so Enumerable.ToArray will be useful in conjunction.
You can do it using LINQ, like this:
Dim input = "apples,fish,oranges,bananas,fish"
Dim strings = input.Split(","c).Distinct().OrderBy(Function(s) s)
I'm not a VB.NET programmer, but I can give you a suggestion:
Split the string into an array
Create a second array
Cycle through the first array, adding any value that is not in the second.
Upon completion, your second array will have only unique values.