1 | function [x Bx,Bz,Px,Pz,Lu] = ReadRadiaMap(FileName) |
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2 | |
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3 | % plot the wiggler field map from radiamap. |
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4 | |
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5 | %FileName = 'w150g11pole20_fin.dat'; |
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6 | %FileName = 'w150g11pole20_fin.dat_interpolation'; |
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7 | |
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8 | |
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9 | fid = fopen(FileName); |
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10 | |
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11 | |
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12 | |
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13 | %% read field map |
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14 | fopen(fid); |
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15 | %read the undulator length, number of horizontal and vertical points |
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16 | par = textscan(fid,'%f',1,'CommentStyle','#'); |
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17 | Lu = par{1};% undulator length [m] |
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18 | par = textscan(fid,'%d',2,'CommentStyle','#'); |
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19 | Px = par{1}(1); % horizontal points |
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20 | Pz = par{1}(2); % vertical points |
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21 | Bx = zeros(Pz,Px+1); |
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22 | Bz = zeros(Pz,Px+1); |
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23 | |
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24 | |
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25 | %read the 'start' string; |
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26 | start = textscan(fid,'%s',1,'CommentStyle','#'); |
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27 | |
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28 | |
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29 | % read the first line,the horizontal coordinates when the fields are measured |
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30 | %the number of points data in this line is only 'Px' |
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31 | L = textscan(fid,'%f',Px,'CommentStyle','#'); |
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32 | x = L{:}; |
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33 | |
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34 | %%read horiztonal field map |
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35 | for i=1:Pz |
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36 | L = textscan(fid,'%f',Px+1,'CommentStyle','#'); % read the field strength line |
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37 | Bz(i,:) = L{:}; % assign each line values to array Bx |
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38 | end |
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39 | |
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40 | %read start line |
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41 | start = textscan(fid,'%s',1,'CommentStyle','#'); |
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42 | % skip the horizontal coordinates for the vertical field map |
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43 | % since it is read before. |
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44 | L = textscan(fid,'%f',Px,'CommentStyle','#'); |
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45 | |
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46 | %read vertical field map |
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47 | for i=1:Pz |
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48 | L = textscan(fid,'%f',Px+1,'CommentStyle','#'); % read the field strength line |
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49 | Bx(i,:) = L{:}; % assign each line values to array Bx |
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50 | end |
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51 | |
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52 | fclose(fid); |
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