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annotate src/ltpda_polyreg/ltpda_polyreg.c @ 4:e3c5468b1bfe database-connection-manager

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Integrate with LTPDAPreferences
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Mon, 05 Dec 2011 16:20:06 +0100
parents f0afece42f48
children
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0
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Daniele Nicolodi <nicolodi@science.unitn.it>
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1 /*
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2 Mex file that implements polynomial detrending of a data vector.
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Daniele Nicolodi <nicolodi@science.unitn.it>
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3
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Daniele Nicolodi <nicolodi@science.unitn.it>
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4 M Hewitson 5-02-08
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5
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6 $Id: ltpda_polyreg.c,v 1.4 2009/12/17 08:02:08 mauro Exp $
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7 */
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8
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9
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10 #include <math.h>
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11 #include <stdio.h>
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12 #include <stdlib.h>
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13 #include <string.h>
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14 #include <mex.h>
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15
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16 #include "ltpda_polyreg.h"
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17 #include "version.h"
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18 #include "../c_sources/polyreg.c"
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19
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20 #define DEBUG 0
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21
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22 /*
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23 Matlab mex file to make polynomial detrending of a data vector
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24
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25 * Inputs
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26 * - data
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27 * - N
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28 *
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29 function [y,a] = ltpda_polyreg(x, N);
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30
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31 */
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32 void mexFunction( int nlhs, mxArray *plhs[],
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33 int nrhs, const mxArray *prhs[])
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34 {
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35 /* Parse inputs */
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36 if( (nrhs == 0) && (nlhs == 0) )
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37 {
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38 print_usage(VERSION);
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39 return;
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40 }
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41 else if ( (nrhs == 2) && (nlhs >= 1) ) /* let's go */
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42 {
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43 double *xdata;
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44 long int nData;
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45 int order;
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46 double *yptr, *aptr;
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47
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48
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49 /* Extract inputs */
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50 xdata = mxGetPr(prhs[0]); /* Pointer to data */
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51 nData = mxGetNumberOfElements(prhs[0]); /* Number of data points */
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52 order = (int)mxGetScalar(prhs[1]); /* Order of detrending */
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53
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54 if (order > 10 || order < -1)
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55 mexErrMsgTxt("Detrending order must be between -1 and 10");
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56
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57 /* Set output matrices */
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58 plhs[0] = mxCreateDoubleMatrix(nData, 1, mxREAL);
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59
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60 /* Get pointers to output matrices */
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61 yptr = mxGetPr(plhs[0]);
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62 if (nlhs == 2)
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63 {
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64 plhs[1] = mxCreateDoubleMatrix(order+1, 1, mxREAL);
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65 aptr = mxGetPr(plhs[1]);
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66 }
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67 else
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68 {
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69 aptr = (double*)mxCalloc(order+1, sizeof(double)); /* detrending output */
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70 }
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71
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72 /* Detrend segment */
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Daniele Nicolodi <nicolodi@science.unitn.it>
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73 switch (order)
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74 {
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75 case -1:
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76 /* no detrending */
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77 memcpy(yptr, xdata, nData*sizeof(double));
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78 break;
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79 case 0:
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80 /* mean removal */
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81 polyreg0 (xdata, nData, yptr, aptr);
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82 break;
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83 case 1:
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84 /* linear detrending */
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85 polyreg1 (xdata, nData, yptr, aptr);
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86 break;
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87 case 2:
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88 /* 2nd order detrending */
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89 polyreg2 (xdata, nData, yptr, aptr);
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90 break;
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91 case 3:
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92 /* 3rd order detrending */
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93 polyreg3 (xdata, nData, yptr, aptr);
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94 break;
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95 case 4:
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96 /* 4th order detrending */
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97 polyreg4 (xdata, nData, yptr, aptr);
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98 break;
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99 case 5:
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100 /* 5th order detrending */
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101 polyreg5 (xdata, nData, yptr, aptr);
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102 break;
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103 case 6:
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104 /* 6th order detrending */
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105 polyreg6 (xdata, nData, yptr, aptr);
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106 break;
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107 case 7:
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108 /* 7th order detrending */
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109 polyreg7 (xdata, nData, yptr, aptr);
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110 break;
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111 case 8:
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112 /* 8th order detrending */
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113 polyreg8 (xdata, nData, yptr, aptr);
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114 break;
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115 case 9:
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116 /* 9th order detrending */
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117 polyreg9 (xdata, nData, yptr, aptr);
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118 break;
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119 case 10:
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120 /* 10th order detrending */
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121 polyreg10(xdata, nData, yptr, aptr);
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122 break;
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123 }
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124
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125 /*// if (nlhs == 2)
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126 // {
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127 // // Free coefficient array
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128 // mxFree(aptr);
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129 // }*/
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130 }
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131 else /* we have an error */
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132 {
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133 print_usage(VERSION);
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134 mexErrMsgTxt("### incorrect usage");
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135 }
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136 }
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137
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138 /*
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139 * Output usage to MATLAB terminal
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140 *
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141 */
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142 void print_usage(char *version)
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143 {
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144 mexPrintf("ltpda_polyreg version %s\n", version);
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145 mexPrintf(" usage: function [y, a] = ltpda_polyreg(x, order); \n");
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146 }
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147
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148