How to extract data from cell array
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Hellow,
I´m a aerospace Engineer,
I´ve this 4x1 cell array read from a text file by "fgetl" function. This code contains information about two nodes (B10 and D22) of a thermal FEM:
%%%%%%
B10 = 'cryos', T = T_caja_top,
A = 0.916088, ALP = 1.000000, EPS = 0.850000,
FX = -0.270000, FY = 0.000000, FZ = 0.000000;
D22 = 'Heater wire 1', T = T_INI, QI = PJoule;
%%%%%%
So, I would like to extrat all the information and create a tipe "structure" variable called "Nodes". Example:
Node B10, Atributes: Name:'cryos', Temperature = T_caja_top, Area = 0,916088...
Node D22, Atributes: Name: 'Heater wire 1', Temperature = T_INI....
Any help is really welcome.
Regard, the delimiter between nodes is: ';'
Thank you so much,
Pelayo Vázquez Rodríguez
2 个评论
Sindar
2020-5-13
check out cell2struct: https://www.mathworks.com/help/matlab/ref/cell2struct.html
Pelayo Vázquez Rodríguez
2020-5-13
采纳的回答
Because you did not upload a sample file I created one (attached) based on your example data.
str = fileread('trial.txt'); % read the entire file as one string
spl = regexp(str,'\w+[^;]+','match'); % split nodes
tkn = regexp(spl,'(\w+)\s*=\s*([^,]+)','tokens'); % identify key=value pairs
num = numel(tkn);
out = struct();
for k = 1:num
tmp = tkn{k};
tmp = strrep(vertcat(tmp{:}).','''','');
vec = str2double(tmp(2,:)); % optional: convert to numeric
idx = ~isnan(vec); % optional: convert to numeric
tmp(2,idx) = num2cell(vec(idx)); % optional: convert to numeric
out.(tmp{1,1}) = struct('Name',tmp{2,1},tmp{:,2:end});
end
Giving a scalar structure containing nested scalar structures with different fields:
>> out
out =
B10: [1x1 struct]
D22: [1x1 struct]
>> out.B10
ans =
Name: 'cryos'
T: 'T_caja_top'
A: 0.91609
ALP: 1
EPS: 0.85
FX: -0.27
FY: 0
FZ: 0
>> out.D22
ans =
Name: 'Heater wire 1'
T: 'T_INI'
QI: 'PJoule'
3 个评论
Pelayo Vázquez Rodríguez
2020-5-13
Pelayo Vázquez Rodríguez
2020-5-14
Stephen23
2020-5-14
Try these, where C is your cell array:
[C{:}]
sprintf(' %s',C{:})
join(C)
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