annotate src/ltpda_ssmsim/ltpda_ssmsim.c @ 8:2f5c9bd7d95d database-connection-manager

Clarify ltpda_uo.retrieve parameters handling
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
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0
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 #include <math.h>
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2 #include <stdio.h>
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3 #include <stdlib.h>
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4 #include <string.h>
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5 #include <mex.h>
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6
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7 #include "matrix.h"
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8 #include "version.h"
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9 #include "ltpda_ssmsim.h"
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10
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11 #define DEBUG 0
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12 /*
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13 * A mex file to propagate an input signal with the given SS model
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14 *
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15 * M Hewitson 19-08-10
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16 *
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17 * $Id: ltpda_ssmsim.c,v 1.4 2010/08/23 11:56:09 ingo Exp $
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18 */
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19
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20
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21 /*
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22 * function [y,lx] = ltpda_ssmsim(lastX, A.', Coutputs.', Cstates.', Baos.', Daos.', input);
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23 */
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24 void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
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25 {
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26
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27 /* outputs */
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28 double *y, *yptr;
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29
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30 /* inputs */
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31 double *input, *iptr;
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32 double *Daos, *Dptr;
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33 double *Baos, *Bptr;
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34 double *Cstates;
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35 double *Coutputs, *Coptr;
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36 double *A, *Aptr;
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37 double *lastX;
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38 double *SSini;
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39 double *tmpX;
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40
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41 mwSize Ninputs, Nsamples, Nstates, Nstatesout, Noutputs;
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42 int kk,jj,ll;
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43 int mm,nn;
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44 int ki;
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45
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46
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47 /* parse input functions */
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48
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49 if( (nrhs == 0) || (nlhs == 0) )
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50 {
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51 print_usage(VERSION);
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52 }
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53
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54 if( (nrhs == 7) && (nlhs == 2) )/* let's go */
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55 {
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56 /*----------------- set inputs*/
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57 SSini = mxGetPr(prhs[0]);
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58 A = mxGetPr(prhs[1]);
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59 Coutputs = mxGetPr(prhs[2]);
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60 Cstates = mxGetPr(prhs[3]);
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61 Baos = mxGetPr(prhs[4]);
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62 Daos = mxGetPr(prhs[5]);
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63 input = mxGetPr(prhs[6]);
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64
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65 Ninputs = mxGetM(prhs[4]);
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66 Nsamples = mxGetN(prhs[6]);
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67 Nstates = mxGetM(prhs[1]);
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68 Nstatesout = mxGetM(prhs[3]);
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69 Noutputs = mxGetN(prhs[2]);
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70
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71 #if DEBUG
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72 mexPrintf("Ninputs: %d\n", Ninputs);
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73 mexPrintf("Nsamples: %d\n", Nsamples);
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74 mexPrintf("Nstates: %d\n", Nstates);
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75 mexPrintf("Nstatesout: %d\n", Nstatesout);
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76 mexPrintf("Noutputs: %d\n", Noutputs);
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77
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78 mexPrintf("N Coutputs: %d\n", mxGetNumberOfElements(prhs[2]));
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79
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80 mexPrintf("input: %dx%d\n", mxGetM(prhs[6]), mxGetN(prhs[6]));
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81 mexPrintf("D: %dx%d\n", mxGetN(prhs[5]), mxGetM(prhs[5]));
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82 #endif
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83
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84 /* output y */
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85 plhs[0] = mxCreateDoubleMatrix(Noutputs, Nsamples, mxREAL);
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86 y = mxGetPr(plhs[0]);
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87
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88 /* output state vector*/
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89 plhs[1] = mxCreateDoubleMatrix(Nstates, 1, mxREAL);
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90 lastX = mxGetPr(plhs[1]);
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91
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92 tmpX = (double*)calloc(Nstates, sizeof(double));
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93 memcpy(lastX, SSini, Nstates*sizeof(double));
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94
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95 /* do the business */
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96 yptr = &(y[0]);
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97 for (kk=0; kk<Nsamples; kk++) {
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98
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99 ki = kk*Ninputs;
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100
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101 /* observation equation */
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102 Coptr = &(Coutputs[0]);
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103 Dptr = &(Daos[0]);
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104 for (jj=0; jj<Noutputs; jj++) {
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105 *yptr = 0.0;
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106 for (ll=0; ll<Nstates; ll++) {
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107 *yptr += *Coptr * lastX[ll] ;
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108 Coptr++;
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109 }
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110 iptr = &(input[ki]);
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111 for (ll=0; ll<Ninputs; ll++) {
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112 *yptr += *Dptr * (*iptr);
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113 Dptr++;
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114 iptr++;
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115 }
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116 yptr++;
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117 }
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118
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119 /* state propagation */
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120 memcpy(tmpX, lastX, Nstates*sizeof(double));
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121 Bptr = &(Baos[0]);
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122 Aptr = &(A[0]);
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123 for (jj=0; jj<Nstates; jj++) {
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124 lastX[jj] = 0;
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125 for (ll=0; ll<Nstates; ll++) {
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126 lastX[jj] += *Aptr * tmpX[ll];
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127 Aptr++;
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128 }
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129 iptr = &(input[ki]);
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130 for (ll=0; ll<Ninputs; ll++) {
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131 lastX[jj] += *Bptr * (*iptr);
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132 Bptr++;
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133 iptr++;
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134 }
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135 }
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136
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137
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138 } /* end sample loop */
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139
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140
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141 free(tmpX);
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142
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143
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144 }
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145 else
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146 {
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147 print_usage(VERSION);
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148 }
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149 }
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150
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151 void print_usage(char *version)
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152 {
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153 mexPrintf("ltpda_ssmsim version %s\n", version);
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154 mexPrintf(" usage: [y,lx] = ltpda_ssmsim(lastX, A.', Coutputs.', Cstates.', Baos.', Daos.', input);");
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155 mexErrMsgTxt("### incorrect usage");
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156 }
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157