clim_daily_tserie_climyear.c File Reference

Compute daily climatology for climatological year. More...

#include <clim.h>
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Functions

void clim_daily_tserie_climyear (double *bufout, double *bufin, tstruct *buftime, double missing_val, int ni, int nj, int nt)
 Compute daily climatology for climatological months of a daily time serie.

Detailed Description

Compute daily climatology for climatological year.

Definition in file clim_daily_tserie_climyear.c.


Function Documentation

void clim_daily_tserie_climyear ( double *  bufout,
double *  bufin,
tstruct buftime,
double  missing_val,
int  ni,
int  nj,
int  nt 
)

Compute daily climatology for climatological months of a daily time serie.

Parameters:
[out] bufout Output 3D matrix of daily climatology for a year.
[in] bufin Input 3D matrix.
[in] buftime Time vector for input vector data.
[in] missing_val Missing value.
[in] ni Horizontal dimension of buffer input vector.
[in] nj Horizontal dimension of buffer input vector.
[in] nt Temporal dimension of buffer input vector.

Definition at line 58 of file clim_daily_tserie_climyear.c.

References alloc_error().

Referenced by remove_seasonal_cycle().

00058                                                                                                                         {
00069   int *index = NULL; /* Index to flag matching a specific day and month in a time serie covering several years. */
00070   double *sum; /* Sum over all matching days. */
00071   int *ndays = NULL; /* Number of days matching days. */
00072   int month; /* Climatological month. */
00073 
00074   int t; /* Loop counter for time. */
00075   int i; /* Loop counter for ni. */
00076   int j; /* Loop counter for nj. */
00077   int day; /* Loop counter for days. */
00078 
00079   (void) fprintf(stdout, "%s: Computing climatological months of a daily time serie.\n", __FILE__);
00080 
00081   /* Allocate memory */
00082   index = (int *) calloc(nt, sizeof(int));
00083   if (index == NULL) alloc_error(__FILE__, __LINE__);
00084   sum = (double *) malloc(ni*nj * sizeof(double));
00085   if (sum == NULL) alloc_error(__FILE__, __LINE__);
00086   ndays = (int *) malloc(ni*nj * sizeof(int));
00087   if (ndays == NULL) alloc_error(__FILE__, __LINE__);
00088 
00089   /* Loop over the 12 months of the year to generate daily climatological months */
00090   for (month=1; month<=12; month++) {
00091     
00092     /* Loop over each day of the month */
00093     for (day=1; day<=31; day++) {
00094       
00095       for (j=0; j<nj; j++)
00096         for (i=0; i<ni; i++) {
00097           sum[i+j*ni] = 0.0;
00098           ndays[i+j*ni] = 0; /* Initialize the number of days */
00099         }
00100       
00101       /* Loop over all the times */
00102       for (t=0; t<nt; t++) {
00103         /* Initialize */
00104         index[t] = 0;
00105         if (buftime[t].day == day && buftime[t].month == month) {
00106           /* The climatological day and month match */
00107           index[t] = 1; /* Flag it */
00108           for (j=0; j<nj; j++)
00109             for (i=0; i<ni; i++)
00110               if (bufin[i+j*ni+t*ni*nj] != missing_val) {
00111                 /* Ignore missing values */
00112                 sum[i+j*ni] += bufin[i+j*ni+t*ni*nj]; /* Sum all the values for this matching day/month */
00113                 ndays[i+j*ni]++;
00114               }
00115         }
00116       }
00117       for (t=0; t<nt; t++)
00118         /* Compute the mean over all the matching days and apply mean for all these flagged days */
00119         /* Assign mean value for all flagged days used in computing this mean */
00120         if (index[t] == 1) {
00121           for (j=0; j<nj; j++)
00122             for (i=0; i<ni; i++)
00123               if (ndays[i+j*ni] > 0) {
00124                 bufout[i+j*ni+t*ni*nj] = sum[i+j*ni] / (double) ndays[i+j*ni];
00125               }
00126               else {
00127                 bufout[i+j*ni+t*ni*nj] = missing_val;
00128               }
00129         }
00130     }
00131   }
00132 
00133   /* Free memory */
00134   (void) free(index);
00135   (void) free(sum);
00136   (void) free(ndays);
00137 }


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