Below is some code that will work in extracting out the a cell array of ID names from the structure. It uses a for loop to achieve this. However I am wondering if there is a way to perform the same task without using a forloop?
tft(1).Id = 'Name1';
tft(1).Desc = 'goes by the name';
tft(2).Id = 'Name2';
tft(2).Desc = 'hates the name';
for a=1:length(tft)
list{a} = tft(a).Id
end
There is a documentation page dedicated to this question: Access Elements of a Nonscalar Struct Array.
Since doing tft.Id returns a comma separated list, you can convert it into a cell array directly by enclosing it in curly braces:
list = {tft.Id};
Related
I am new o scripting in powershell and am from a Python background. I want to know if I'm doing this right.
I created this array and want to extract each item one by one
$M365_E3_Grps = ("O365-CHN-DomainUser,O365-Vendor-Exchange-User")
ForEach ($Indiv_Grp in $M365_E3_Grps) {
ForEach ($Indiv_Grp in $M365_E3_Grps) {
`$ADGroup = $Indiv_Grp$ADGroup = $Indiv_Grp`
I want to know if we can extract vals with a for loop like this and assign it to a variable like this.
Construct of your array
Your array is not quite correct and will be populated as a string. To create a string array you will need to quote each item in comma separated list. The parentheses are also not required.
$M365_E3_Grps = "O365-CHN-DomainUser","O365-Vendor-Exchange-User"
Your foreach keyword syntax is however correct, even if the formatting in your question was slightly off.
foreach ($Indiv_Grp in $M365_E3_Grps) {
# Assigning $Indiv_Grp to $ADGroup here is kind of redundant since
# the value is already assinged to $Indiv_Grp
$Indiv_Grp
}
I am trying to grab data from an excel spread sheet and grab only the information from cells that match a string. Eg. if cell A10 contains the word 'Canada' it should return that cell.
I have tried using strcmp(https://www.mathworks.com/help/matlab/ref/strcmp.html) to check if string in argument 1 is contained in a cell array containing many strings, the second argument
[num,txt,raw] = xlsread('\\Client\C$\Users\Fish\Desktop\dataset\dataset.csv');
mytable = cell(raw);
for i = 1:54841
array_index = i;
string_index = mytable(i,2);
string_eastern = {'Canada', 'Ontario'};
if strcmp(string_index,string_eastern);
fprintf('%d\n',array_index)
end
end
In the above example if my string_eastern only contains one element, say 'Canada', it will return the index value of every instance of 'Canada'. If I add more elements I expect it would return index values for every instance where string_index would match with a string contained in string_eastern. However I get no results at all if I add more elements.
Pretty much I wanted to check my string_index agaisnt string_eastern, if the values match then I want it to return that cell value. This works when string_eastern is only 1 element but does not work with more than 1.
To access cell contents, use the curly brackets {}. So if I wanted to access the first element of my cell, I would say this:
string = cell{1};
Read more on the MATLAB Documentation about cells to learn more and to answer any of your further questions.
I have a cell array with values similar to the following one
13:41:54.879
I would like to extract only 13:41 part of the given value and mitigate the rest. I tried various combinations of extractBefore() and extractAfter() but couldn't get it.
You can use a regular expression to match the pattern "digits, colon, digits":
c = {'13:41:54.879', '1:22:33.45679'};
result = regexp(c, '\d+:\d+', 'match', 'once');
gives
result =
1×2 cell array
{'13:41'} {'1:22'}
Below is what I have so far. I need to iterate through each field of rxnsBothKaletaS struct where each field represents a nx4 cell. I need to extract information out of the first column of that cell as a single string separated by commas and then assign it to an index of the field in fname.
(To give the context: fname are names of the genes and within eaach gene are reactions that rely on that gene. I need to extract all of the reactions for a given gene and have them all as a string separated by commas)
fname = fieldnames(rxnsBothKaletaS)
for i = 1:numel(fname)
gene = rxnsBothKaletaS.(fname{i})
for j = 1:size(gene,1)
rxns = rxns + char(string(gene(j,1)));
end
fname(i,2) = rxns;
end
You can use structfun to iterate through the fields of a struct. Then within the anonymous function that we will apply to each field, we can use strjoin to join all strings in the first column of x together with commas.
fnames = structfun(#(x)strjoin(x(:,1), ','), rxnsBothKaletaS, 'UniformOutput', 0);
Suppose we have an array of structure. The structure has fields: name, price and cost.
Suppose the array A has size n x 1. If I'd like to display the names of the 1st, 3rd and the 4th structure, I can use the command:
A([1,3,4]).name
The problem is that it prints the following thing on screen:
ans =
name_of_item_1
ans =
name_of_item_3
ans =
name_of_item
How can I remove those ans = things? I tried:
disp(A([1,3,4]).name);
only to get an error/warning.
By doing A([1,3,4]).name, you are returning a comma-separated list. This is equivalent to typing in the following in the MATLAB command prompt:
>> A(1).name, A(3).name, A(4).name
That's why you'll see the MATLAB command prompt give you ans = ... three times.
If you want to display all of the strings together, consider using strjoin to join all of the names together and we can separate the names by a comma. To do this, you'll have to place all of these in a cell array. Let's call this cell array names. As such, if we did this:
names = {A([1,3,4]).name};
This is the same as doing:
names = {A(1).name, A(3).name, A(4).name};
This will create a 1 x 3 cell array of names and we can use these names to join them together by separating them with a comma and a space:
names = {A([1,3,4]).name};
out = strjoin(names, ', ');
You can then show what this final string looks like:
disp(out);
You can use:
[A([1,3,4]).name]
which will, however, concatenate all of the names into a single string.
The better way is to make a cell array using:
{ A([1,3,4]).name }