Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / io-1.0.19 / pch2mat.m

diff --git a/octave_packages/io-1.0.19/pch2mat.m b/octave_packages/io-1.0.19/pch2mat.m
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+%% Copyright (C) 2011, Bilen Oytun Peksel <oytun.peksel@gmail.com>
+%% All rights reserved.
+%%
+%% Redistribution and use in source and binary forms, with or without
+%% modification, are permitted provided that the following conditions are met:
+%%
+%%    1 Redistributions of source code must retain the above copyright notice,
+%%      this list of conditions and the following disclaimer.
+%%    2 Redistributions in binary form must reproduce the above copyright
+%%      notice, this list of conditions and the following disclaimer in the
+%%      documentation and/or other materials provided with the distribution.
+%%
+%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
+%% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+%% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+%% ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+%% ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+%% DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+%% SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+%% CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+%% OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+%% OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+%% -*- texinfo -*-
+%% @deftypefn {Function File} {@var{data} =} pch2mat (@var{filename})
+%% Converts NASTRAN PCH file (SORT2) to a data structure and frequency vector. A
+%% filename as a string is the only needed input.
+%%
+%% The output is in the form of struct. containing a freq vector n x 1 called
+%% data.f, and the remaining data are in the form of subcases, point ids
+%% and directions respectively. for ex. data.S1.p254686.x and they are n x 2
+%%
+%% @end deftypefn
+
+function [data] = pch2mat(filename);
+
+    %% Open the file and read the file line by line to form a line character array
+    fid = fopen(filename);
+    l = 1;
+    while (~feof(fid))
+        raw{l} = fgets(fid);
+        l      = l + 1;
+    end
+
+    %% Determine Freq_count and number of lines for each case
+    a          = strmatch('$TITLE',raw);
+    lines      = a(2) -a(1); %number of lines on each subcase and related point id
+    freq_count = (lines-7)/4;
+
+    %% Read from array
+    C = length(raw) / lines; %number of subcase and related point id
+
+    for k = 1 : C; %looping through every case
+        scase = char(raw{(k-1) * lines + 3}(12:16));
+        scase = genvarname(scase);
+        pid   = char(raw{(k-1) * lines + 7}(16:25));
+        pid   = genvarname(['p' pid]);
+        if (k==1)
+            data.f = zeros(freq_count,1);
+        end;
+        data.(scase).(pid).x  = zeros(freq_count,2);
+        data.(scase).(pid).y  = zeros(freq_count,2);
+        data.(scase).(pid).z  = zeros(freq_count,2);
+        data.(scase).(pid).r1 = zeros(freq_count,2);
+        data.(scase).(pid).r2 = zeros(freq_count,2);
+        data.(scase).(pid).r3 = zeros(freq_count,2);
+        i = (k-1) * lines + 8 ;
+        j = 0;
+
+        while( i <= (lines * k)) %loop for each case
+            j=j+1;
+            if (k==1)
+                data.f(j) = str2double(raw{i}(5:17));
+            end
+            data.(scase).(pid).x(j,1)  = str2double(raw{i}(25:37));
+            data.(scase).(pid).y(j,1)  = str2double(raw{i}(43:55));
+            data.(scase).(pid).z(j,1)  = str2double(raw{i}(61:73));
+            i=i+1;
+            data.(scase).(pid).r1(j,1) = str2double(raw{i}(25:37));
+            data.(scase).(pid).r2(j,1) = str2double(raw{i}(43:55));
+            data.(scase).(pid).r3(j,1) = str2double(raw{i}(61:73));
+            i=i+1;
+            data.(scase).(pid).x(j,2)  = str2double(raw{i}(25:37));
+            data.(scase).(pid).y(j,2)  = str2double(raw{i}(43:55));
+            data.(scase).(pid).z(j,2)  = str2double(raw{i}(61:73));
+            i=i+1;
+            data.(scase).(pid).r1(j,2) = str2double(raw{i}(25:37));
+            data.(scase).(pid).r2(j,2) = str2double(raw{i}(43:55));
+            data.(scase).(pid).r3(j,2) = str2double(raw{i}(61:73));
+            i=i+1;
+        end
+    end
+end