How to Search a struct array?

Hi

I am new to Matlab and would like to know if i can search a array strucuture without using a loop.

I have strucuture array with 8 feilds. Please see below.

I am trying the following:

K>> alldata(ID=="864475047572713").Data
Unrecognized function or variable 'ID'.

This seems to be wrong, but what is the correct way of doing this?

K>> alldata

alldata = 

  1×8 struct array with fields:

    ID    
    location
    electrosensor_values
    Data

K>> alldata(1)

ans = 

  struct with fields:

                      ID: "864475047690895"
                location: "GPS12121"
    electrosensor_values: [1×1 struct]
                    Data: [81603×12 timetable]

K>> alldata(2)

ans = 

  struct with fields:

                      ID: "864475047636435"
                location: "GPS12121"
    electrosensor_values: [1×1 struct]
                    Data: [79899×12 timetable]

K>> alldata(3)

ans = 

  struct with fields:

                      ID: "864475047572713"
                location: "GPS12121"
    electrosensor_values: [1×1 struct]
                    Data: [78759×12 timetable]

K>> alldata(4)

ans = 

  struct with fields:

                      ID: "864475047564256"
                location: "GPS12121"
    electrosensor_values: [1×1 struct]
                    Data: [84734×12 timetable]                                       
                    

Answer 1

[Matt J]

Perhaps this is what you meant?

somedata = alldata([alldata.ID]=="864475047572713")

[Dharmesh Joshi]

Yes it seems [alldata.ID] solved the issue.

Thanks

Answer 2

[dpb]

With the ID field being a string, probably the easiest syntax is simply

ID=="864475047572713";
idx=find(matches([alldata.ID],ID));

then idx is the index into the struct array of interest; all properties are then as

tDataID=alldata(idx).Data;

Now, in the specific case, you can access the table as normal thru the tDataID table variable.