readBD: Daily or intradaily values of global horizontal irradiation...

In solaR: Solar Photovoltaic Systems

Description

Constructor for the class Meteo with values of daily or intradaily values of global horizontal irradiation and ambient temperature from a local file or a data.frame.

Usage

readBD(file,  lat,
       format='%d/%m/%Y',
       header=TRUE, fill=TRUE, dec='.', sep=';',
       dates.col='date',source=file)

readBDi(file,  lat,
       format='%d/%m/%Y %H:%M:%S',
       header=TRUE, fill=TRUE, dec='.', sep=';',
       time.col='time',
       source=file)

df2Meteo(file,  lat,
         format='%d/%m/%Y',
         dates.col='date',
         source='')

dfI2Meteo(file,  lat,
         format='%d/%m/%Y %H:%M:%S',
         time.col='time',
         source='')

zoo2Meteo(file, lat, source='')

Arguments

file	The name of the file (readBD and readBDi), data.frame (df2Meteo and dfI2Meteo) or zoo (zoo2Meteo) which the data are to be read from. It should contain a column G0 with daily (readBD and df2Meteo) or intradaily (readBDi and dfI2Meteo) values of global horizontal irradiation (Wh/m²). It should also include a column named Ta with values of ambient temperature. However, if the object is only a vector with irradiation values, it will converted to a zoo with two columns named G0 and Ta (filled with constant values) If the Meteo object is to be used with calcG0 (or fCompD, fCompI) and the option corr='none', the file/data.frame must include three columns named G0, B0 and D0 with values of global, direct and diffuse irradiation on the horizontal plane. Only for daily data: if the ambient temperature is not available, the file should include two columns named TempMax and TempMin with daily values of maximum and minimum ambient temperature, respectively (see fTemp for details).
header, fill, dec, sep	See read.table
format	character string with the format of the dates or time index. (Default for daily time bases:%d/%m/%Y). (Default for intradaily time bases: %d/%m/%Y %H:%M:%S)
lat	numeric, latitude (degrees) of the location.
dates.col	character string with the name of the column wich contains the dates of the time series.
time.col	character string with the name of the column wich contains the time index of the series.
source	character string with information about the source of the values. (Default: the name of the file).

Value

A Meteo object.

Author(s)

Oscar Perpiñán Lamigueiro.

See Also

read.table, readSIAR, readG0dm.

Examples

data(helios)
names(helios)=c('date', 'G0', 'TempMax', 'TempMin')

bd=df2Meteo(helios, dates.col='date', lat=41, source='helios-IES', format='%Y/%m/%d')

summary(getData(bd))

xyplot(bd)

Example output

Loading required package: zoo

Attaching package: 'zoo'

The following objects are masked from 'package:base':

    as.Date, as.Date.numeric

Loading required package: lattice
Loading required package: latticeExtra
Loading required package: RColorBrewer
Time Zone set to UTC.

     Index                           G0             TempMax     
 Min.   :2009-01-01 00:00:00   Min.   :  325.6   Min.   : 1.41  
 1st Qu.:2009-04-08 12:00:00   1st Qu.: 2523.2   1st Qu.:14.41  
 Median :2009-07-07 00:00:00   Median : 4745.7   Median :23.16  
 Mean   :2009-07-04 21:29:54   Mean   : 4812.0   Mean   :22.59  
 3rd Qu.:2009-10-03 12:00:00   3rd Qu.: 7139.5   3rd Qu.:31.06  
 Max.   :2009-12-31 00:00:00   Max.   :11253.9   Max.   :38.04  
    TempMin       
 Min.   :-37.500  
 1st Qu.:  1.950  
 Median :  7.910  
 Mean   :  5.323  
 3rd Qu.: 15.105  
 Max.   : 24.800  

solaR documentation built on May 2, 2019, 6:07 p.m.