Verfasst am: 06.11.2014, 23:05
Titel: Druckverteilungsdaten aus (*.asf bzw. txt) importieren
Vielleicht kann mir jemand helfen?!
Ich will Druckverteilungsdaten von Tekscan in *.asf Format in Matlab einlesen, jedoch gibts immer den Fehler:
SWITCH expression must be a scalar or string constant.
Error in read_txt_tekscan (line 77)
switch parameters_temp
Error in preprocess_tekscandata (line 55)
[TSmtrx, TKS, TEKSCAN_INFO]=read_txt_tekscan(filename);
TSmtrx und TEKSCAN_INFO werden berechnet, nur TKS nicht
Code:
[FileName,PathName,~]=uigetfile('*.asf','Wähle .asf Datei aus','Fz','MultiSelect','on');
% Open filebrowser and select different tests manually
v_tekscan = 0.0409;
% Velocity Tekscansheet with respect to the tire
R= [];
% Initiate R for structure R. Used for data about reliability and reproducibility
filename=strcat(PathName,FileName);function [TSmtrx,TKS,TEKSCAN_INFO] = read_txt_tekscan(filename) % filename % Script to convert TekScan ASCII data to matlab data. % The configuration of the TekScan software should be:
%
% Number of Frames: 250 [-] % Seconds per Frame: 0.04 [s]
%
% HOW TO USE
%
% Enter: read_txt_tekscan(filename) % to start the conversion.
%
% INPUT
%
% An ASCII file containing data from a TekScan movie
%
% OUTPUT
%
% M_movie, containing the footprint in a 3D matrix [mxnxp] % m = length of the footprint % n = width of the footprint % p = frame number (time step) % 1 output unit = 0.1 [Bar]
fid = fopen(filename);
errmsg = '';
while fid < 0 disp(errmsg);
filename = input('Open file: ', 's');
[fid,errmsg] = fopen(filename);
end % Open filename for read access
tline ='a';
% Tline may not be empty at the beginning, so the value 'a' is arbitrary
p = 1;
% Start at Frame 1 movie = zeros([176,192,250]);
% Preallocating memory for variable
%41
str = sprintf('open %s', char(filename));
TEKSCAN_INFO = [];
% Cell array of strings for information about test disp(str) % *********************************************************************** % *********************************************************************** whileisempty(tline) || ( ~isempty(tline) && ~strcmp(tline(1),'@')) % When a '@' is read, the end of the file is reached ifisempty(tline)
tline = fgetl(fid);
% Line with text: Frame (number), go to next line
%tline = fgetl(fid);
% Read first line of data
m = 1;
while ~isempty(strfind(tline,','))% . vervangen door , % As long as there is data in tline
tline = strrep(tline,',',' ');
% Change the seperation comma into an empty space. movie(m,:,p) = sscanf(tline,'%f',[1,192]);
% Write data into variable 'movie' (%f = floating point numbers)
m = m + 1;
% Next m (is next line of sensels)
tline = fgetl(fid);
% Read next line of data end % End while
p = p + 1;
% Next p (is next frame (timestep)) else [tline,lt] = fgets(fid);
% Read empty line
TEKSCAN_INFO = char(TEKSCAN_INFO,tline);
% Store test infomartion in info matrix
parameters_temp = sscanf(tline,'%s %*f');
% Temporary parameter storage switch parameters_temp
case 'ROWS'
TKS.ROWS = sscanf(tline,'%*s %f');
% Tekscan rows case 'COLS'
TKS.COLS = sscanf(tline,'%*s %f');
% Tekscan columns case 'ROW_SPACING'
TKS.ROW_SPACING = sscanf(tline,'%*s %f')/1000;
% Space between rows [m] case 'COL_SPACING'
TKS.COL_SPACING = sscanf(tline,'%*s %f')/1000;
% Space between columns [m] 42 case 'SENSEL_AREA'
TKS.SENSEL_AREA = sscanf(tline,'%*s %f')/1000^2;
% Sense area [m^2] ifsscanf(tline,'%*s %*f %s')=='inÂ'
% Test for inches or mm and change units
TKS.SENSEL_AREA = TKS.SENSEL_AREA*25.4^2;
TKS.ROW_SPACING = TKS.ROW_SPACING*25.4;
TKS.COL_SPACING = TKS.COL_SPACING*25.4;
end % end for case 'NOISE_THRESHOLD'
TKS.TRESHOLD = sscanf(tline,'%*s %f');
% Noise treshold used by Tekscan case 'SECONDS_PER_FRAME'
TKS.SAMPLETIME = sscanf(tline,'%*s %f');
% Seconds per frame case 'Bandmaat:'
TKS.TIREWIDTH = sscanf(tline,'%*s %f');
% Tirewidth as in normal tiredimensions
TKS.TIREHEIGHT = sscanf(tline,'%*s %*f %*c %f');
% Tireheight as in normal tiredimensions. In precentage (as usual)
TKS.TIRERADIUS = sscanf(tline,'%*s %*f %*c %*f %*s %f');
% Tireradius as in normal tiredimensions case 'Belastung:'
TKS.LOAD = sscanf(tline,'%*s %f');
% Load [kg] case 'START_FRAME'
TKS.FFRAME = sscanf(tline,'%*s %f');
% First frame (in principal always 1) case 'END_FRAME'
TKS.FRAMES = sscanf(tline,'%*s %f');
% Last frame (also refered to as number of frames) otherwise % Just continue when no case is true end % End switch end % End if end % End while fclose(fid);
% Close file
TSmtrx = permute(movie,[2,1,3]);
% Reshape matrix disp('TSmtrx') % TSmtrx = uint8( floor(TSmtrx * 10)); % Convert to uint8 for memory reasons, Output: 1 [unit] = 0.1 [Bar] end % End function
dann lass doch mal den Debugger laufen und schaue, was parameters_temp in der Zeile ist.
Meine Vermutung ist, dass der Code für eine Datei mit leicht abweichendem Format geschrieben wurde. Letztlich wirst du bzw. der Programmierer herausfinden müssen, wo die Unterschiede liegen und wie man damit umgehen kann.
Danke für die Antwort!
bei parameters_temp kommt wie gesagt der fehlercode oben, wenn ich
num2str(parameters_temp) mache
ans =
68
65
84
65
95
84
89
80
69
Ich denke die struct datei TKS soll gefüllt mit Zahlen werden ,
wie ROW, COL (ect.)
parameters_temp muss den case treffen
Code:
switch(parameters_temp) case 'ROWS'
TKS.ROWS = sscanf(tline,'%*s %f');
% Tekscan rows case 'COLS'
TKS.COLS = sscanf(tline,'%*s %f');
% Tekscan columns case 'ROW_SPACING'
TKS.ROW_SPACING = sscanf(tline,'%*s %f')/1000;
% Space between rows [m] case 'COL_SPACING'
TKS.COL_SPACING = sscanf(tline,'%*s %f')/1000;
% Space between columns [m] 42 case 'SENSEL_AREA'
TKS.SENSEL_AREA = sscanf(tline,'%*s %f')/1000^2;
% Sense area [m^2]
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