I have the following string: WhatsappAutoResponse+landing+redirectFrom1206+redirectFrom1352
My goal is to extract the numbers after the substrings +redirectfrom and store that in an array, like this: [1206, 1352]
I managed to do the following:
The function split_to_array separates the string in parts. The numbers I'm looking for are the 2nd and 3rd elements in the array. I don't want the first element.
select split_to_array('WhatsappAutoResponse+landing+redirectFrom1206+redirectFrom1352', '+redirectFrom');
Result: ["WhatsappAutoResponse+landing","1206","1352"]
I get rid of the 1st element using the subarray function:
select subarray(split_to_array('WhatsappAutoResponse+landing+redirectFrom1206+redirectFrom1352', '+redirectFrom'),1,2);
Result: ["1206","1352"]
Almost there! However, I'm getting an array of strings, but I need an array of integers. I couldn't find a way to cast values inside an array, like in array::int
Is there any way to solve this?
Related
I am dynamically storing data from different data recorders in timetables, nested in a structure DATA, such as DATA.Motor (timetable with motor data), DATA.Actuators (timetable with actuators data) and so on.
My objective is to have a function that synchronizes and merges these timetables so I can work with one big timetable.
I am trying to use synchronize to merge and synchronize those timetables:
fields = fieldnames(DATA);
TT = synchronize(DATA.(fields{1:end}));
but get the following error:
Expected one output from a curly brace or dot indexing expression, but there were 3 results.
This confuses me because DATA.(fields{1}) return the timetable of the first field name of the DATA structure.
Any thought on how I can solve this is greatly appreciated.
The problem here is that fields{1:end} is returning a "comma-separated list", and you're not allowed to use one of those as a struct dot-index expression. I.e. it's as if you tried the following, which is not legal:
DATA.('Motor','Actuators')
One way to fix this is to pull out the values from DATA into a cell array, and then you can use {:} indexing to generate the comma-separated list as input to synchronize, like this:
DATA = struct('Motor', timetable(datetime, rand), ...
'Actuators', timetable(datetime, rand));
DATA_c = struct2cell(DATA);
TT = synchronize(DATA_c{:});
In my code, I have a structure and in a field of it, I want to sort its values.
For instance, in the field of File_Neg.name there are the following values, and They should be sorted as the right values.
File_Neg.name --> Sorted File_Neg.name
'-10.000000.dcm' '-10.000000.dcm'
'-102.500000.dcm' '-12.500000.dcm'
'-100.000000.dcm' '-100.000000.dcm'
'-107.500000.dcm' '-102.500000.dcm'
'-112.500000.dcm' '-107.500000.dcm'
'-110.000000.dcm '-110.000000.dcm'
'-12.500000.dcm' '-112.500000.dcm'
There is a folder that there are some pictures with negative labels in it (above example are labels of pictures). I want to get them in the same order as present in the folder(that's mean the Sorted File_Neg.name). But when running the following code the values of Files_Neg.name load as the above example (left: File_Neg.name), while I want the right form.
I have also seen this and that but they didn't help me.
How to sort values of a field in a structure in Matlab?
Files_Neg = dir('D:\Rename-RealN');
File_Neg = dir(strcat('D:\Rename-RealN\', Files_Neg.name, '\', '*.dcm'));
% when running the code the values of Files_Neg.name load as the above example (left: File_Neg.name)
File_Neg.name:
This answer to one of the questions linked in the OP is nearly correct for the problem in the OP. There are two issues:
The first issue is that the answer assumes a scalar value is contained in the field to be sorted, whereas in the OP the values are char arrays (i.e. old-fashioned strings).
This issue can be fixed by adding 'UniformOutput',false to the arrayfun call:
File_Neg = struct('name',{'-10.000000.dcm','-102.500000.dcm','-100.000000.dcm','-107.500000.dcm','-112.500000.dcm','-110.000000.dcm','-12.500000.dcm'},...
'folder',{'a','b','c','d','e1','e2','e3'});
[~,I] = sort(arrayfun(#(x)x.name,File_Neg,'UniformOutput',false));
File_Neg = File_Neg(I);
File_Neg is now sorted according to dictionary sort (using ASCII letter ordering, meaning that uppercase letters come first, and 110 still comes before 12).
The second issue is that OP wants to sort according to the magnitude of the number in the file name, not using dictionary sort. This can be fixed by extracting the value in the anonymous function applied using arrayfun. We use str2double on the file name, minus the last 4 characters '.dcm':
[~,I] = sort(arrayfun(#(x)abs(str2double(x.name(1:end-4))),File_Neg));
File_Neg = File_Neg(I);
Funnily enough, we don't want to use 'UniformOutput',false any more, since the anonymous function now returns a scalar value.
This string response i am getting from server.
2001,wooza,0420224346,J Wratt ,+61417697070,2013-55-1803-55-54.jpg,No<br />2002,wooza,0420224346,J Wratt ,+61417697070,2013-56-1803-56-17.jpg,No<br />2003,testing,9894698946,ggh hjj,9894598945,2013-11-1811-11-40.jpg,Yes<br />
I separate each record through "br" and stored it in a array.How do i access (2013-55-1803-55-54.jpg) value from array.
You can get through objectAtIndex method.
Alrenatively its better you keep the all the related data of your custom class and storing that in array.
Most of the times you will need more than one value during display. In that case, just get the object from array and show related info through object reference.
Take comma separated strings from an intended element in a different array and use NSPredicate to get the string containing .jpg in it.
I am currently successfully using a CASE expression to update an empty column based on attributes from other columns. For example
UPDATE table SET cat = CASE
WHEN term = '{"Boulder"}' then 'Boulder'
However, I need to do the same but on an text array and particularly when an element is in a specific position within that array.
For example if the data looks like
{"Boulder, Tree, Bush"}
WHEN position('Tree' in term) > 0 then 'Boulder'
But I receive an error message
function pg_catalog.position(character varying[], unknown) does not exist
I have used position in a function before so I am not sure why PostgreSQL does not like it in this situation.
Is there a way to using a CASE expression whilst determining the position of a text element within an array.
Apparently your term column is defined as an array, e.g. varchar[]. The position function only works with scalar values, not with arrays.
If you want to test if an element is contained in an array you need to use a different operator: #>
update foobar
set cat = 'Boulder'
where term #> '{"Boulder"}'
The expression '{"Boulder"}' creates an array with a single element. It's equivalent to array['Boulder'] (which I find more readable). So the above where condition updates all rows where the array term contains all elements of the array on the right hand side of the operator. In this case it's only a single element you are testing for.
More details about the array functions and operators can be found in the manual: http://www.postgresql.org/docs/current/static/functions-array.html
Edit after the requirements have changed
To find and update only those where boulder is in the first, second or third place, you can use this:
update foobar
set cat = 'Boulder'
where 'Boulder' in (term[1], term[2], term[3]);
I previously posted on how to display and access structure array content. The file consisted of states, capitals, and populations. Now I'm having trouble in created a new structure by organizing these states in alphabetical order. I did this by the sortrows function, and I tried pairing up the values of population and the capitals with the alphabetical states, but I can't seem to get it to be an array. I want it to be an array so I can write it to a file. This is what I have so far:
fid=fopen('Regions_list.txt')
file=textscan(fid,'%s %s %f','delimiter',',')
State=file{1}
Capital=file{2}
Population=num2cell(file{3})
sortedStates=sortrows(State)
n=length(State)
regions=struct('State',State,...
'Capital',Capital,...
'Population',Population)
for k=1:n;
region=sortedStates(k);
state_name={regions.State};
state_reference=strcmpi(state_name,region);
state_info=regions(state_reference)
end
I hope I'm making myself clear.
Use this to sort the cell array read in (no conversion needed), then write to file with this.
With respect to your sorting issue, The function SORT will return as its second output a sort index which can be used to apply the same sort order to other arrays. For example, you could sort your arrays before you create your structure array:
[sortedStates,sortIndex] = sort(State);
regions = struct('State',sortedStates,...
'Capital',Capital(sortIndex),...
'Population',Population(sortIndex));
Or you could apply your sorting after you create your structure array:
regions = struct('State',State,...
'Capital',Capital,...
'Population',Population);
[~,sortIndex] = sort({regions.State});
regions = regions(sortIndex);
However, I'm not sure what you mean when you say "I want it to be an array so I can write to a file."