Getting structure content using strings

Question

samuel okeleye 2018-8-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/414456-getting-structure-content-using-strings

评论： samuel okeleye 2018-8-11

I have kt containing data type "strings", one of them is "grad"i.e kt(1,1)=grad which is a string. I am also trying to get the content of the structure(Data.edata.grad) in my data using the string data set by doing Data.edata.kt(1,1) but i am getting the error kt(1,1) is not an existing field. How can i convert a string to a structure or how can i use my string data set to get the structures?

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samuel okeleye 2018-8-11

编辑：Walter Roberson 2018-8-11

在 MATLAB Online 中打开

clear;
clc;
load('Unit 1001 Session 0068.mat')
k=Data.ECU_Data;
m=Data.Continuous_Data;
%CREATING THE FIELDS THAT NEED TO BE CHECKED
fieldcheck={'spn00084_src00_wheel_based_vehicle_speed';...
'spn00190_src00_engine_speed';...
'spn00102_src00_engine_intake_manifold_1_pressure';...
'spn00105_src00_engine_intake_manifold_1_temperature';...
'spn00108_src00_barometric_pressure';... 
'spn00513_src00_actual_engine___percent_torque';...
'spn00110_src00_engine_coolant_temperature';...
'spn00183_src00_engine_fuel_rate';...
'spn00514_src00_nominal_friction___percent_torque';...
'spn00528_src00_engine_speed_at_point_2_engine_configuration';...
'spn00529_src00_engine_speed_at_point_3_engine_configuration';...
'spn00530_src00_engine_speed_at_point_4_engine_configuration';...
'spn00531_src00_engine_speed_at_point_5_engine_configuration';...
'spn00540_src00_engine_percent_torque_at_point_2_engine_configur';...
'spn00541_src00_engine_percent_torque_at_point_3_engine_configur';...
'spn00542_src00_engine_percent_torque_at_point_4_engine_configur';...
'spn00543_src00_engine_percent_torque_at_point_5_engine_configur';...
'spn00544_src00_engine_reference_torque_engine_configuration';...
'spn04154_src00_actual_engine___percent_torque_high_resolution';...
'spn03700_src00_diesel_particulate_filter_active_regeneration_st'};
fieldcheck2={'ambient.temperature';...
'vehicle.speed.gps';...
'vehicle.position.latitude';...
'vehicle.position.longitude';... 
'vehicle.position.altitude'};
%%Channel Existence Check
af1=isfield(k,{'spn00084_src00_wheel_based_vehicle_speed';...
'spn00190_src00_engine_speed';...
'spn00102_src00_engine_intake_manifold_1_pressure';...
'spn00105_src00_engine_intake_manifold_1_temperature';...
'spn00108_src00_barometric_pressure';... 
'spn00513_src00_actual_engine___percent_torque';...
'spn00110_src00_engine_coolant_temperature';...
'spn00183_src00_engine_fuel_rate';...
'spn00514_src00_nominal_friction___percent_torque';...
'spn00528_src00_engine_speed_at_point_2_engine_configuration';...
'spn00529_src00_engine_speed_at_point_3_engine_configuration';...
'spn00530_src00_engine_speed_at_point_4_engine_configuration';...
'spn00531_src00_engine_speed_at_point_5_engine_configuration';...
'spn00540_src00_engine_percent_torque_at_point_2_engine_configur';...
'spn00541_src00_engine_percent_torque_at_point_3_engine_configur';...
'spn00542_src00_engine_percent_torque_at_point_4_engine_configur';...
'spn00543_src00_engine_percent_torque_at_point_5_engine_configur';...
'spn00544_src00_engine_reference_torque_engine_configuration';...
'spn04154_src00_actual_engine___percent_torque_high_resolution';...
'spn03700_src00_diesel_particulate_filter_active_regeneration_st'});
af2=isfield(m,{'ambient.temperature';...
'vehicle.speed.gps';...
'vehicle.position.latitude';...
'vehicle.position.longitude';... 
'vehicle.position.altitude'});
%Available and Unavailable Channels
af1av=fieldcheck(af1==1);
af1unav=fieldcheck(af1==0);
%
af2av=fieldcheck2(af2==1);
af2unav=fieldcheck2(af2==0);
avk=k.af1av
Error
Reference to non-existent field 'af1av'.
Error in QA_QC (line 86)
avk=k.af1av;

samuel okeleye 2018-8-11

I switched the string to cell for simplicity.

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Answer 1

Walter Roberson 2018-8-11

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/414456-getting-structure-content-using-strings#answer_332386

在 MATLAB Online 中打开

Data.edata.(kt(1,1))

You might perhaps need to use

Data.edata.(kt{1,1})

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Walter Roberson 2018-8-11

That code relies upon the fields all being the same datatype and all scalars (either numeric scalars or scalar logical or scalar character or scalar cell array.)

samuel okeleye 2018-8-11