In f0nzie/zFactor: Calculate the Compressibility Factor 'z' for Hydrocarbon Gases

library(zFactor)

# get a number with two decimals
extractCurveNumber <- function(str) {
    # numbers WITHOUT including the dot and comma
    ul <- unlist(regmatches(str, gregexpr('\\(?[0-9]+', str)))
    curv_num <- as.numeric(ul) / 100
    curv_num
}

getCurvesDigitized <- function(pprRange) {
    range_valid <- c("lp", "hp", "all", "common")
    if (!pprRange %in% range_valid) stop("Ppr range keyword not valid")

    if (pprRange == "common") {
        lp_digit <- listStandingKatzCurves(pprRange = "lp")
        hp_digit <- listStandingKatzCurves(pprRange = "hp")
        lp_vec <- sapply(lp_digit, extractCurveNumber)
        hp_vec <- sapply(hp_digit, extractCurveNumber)
        intersect(lp_vec, hp_vec)
    } else {
        curves_digitized <- listStandingKatzCurves(pprRange = pprRange)
        curves_vec <- sapply(curves_digitized, extractCurveNumber)
        names(curves_vec) <- NULL
        unique(curves_vec)   # only unique values if `all`. intersection of lp and hp
    }

}

getCurvesDigitized(pprRange = "all")

library(zFactor)

# get a number with two decimals
extractCurveNumber <- function(str) {
    # numbers WITHOUT including the dot and comma
    ul <- unlist(regmatches(str, gregexpr('\\(?[0-9]+', str)))
    curv_num <- as.numeric(ul) / 100
    curv_num
}

low_pres <- listStandingKatzCurves(pprRange = 'lp')

res <- sapply(low_pres, extractCurveNumber)
names(res) <- NULL
res

# get a number with two decimals
extractCurveNumber <- function(str) {
    # numbers WITHOUT including the dot and comma
    ul <- unlist(regmatches(str, gregexpr('\\(?[0-9]+', str)))
    curv_num <- as.numeric(ul) / 100
    curv_num
}

curve <- c("sk_lp_tpr_105.txt")
extractCurveNumber(curve)

years<-c("20 years old", "1 years old")
# pattern is by finding a set of numbers in the start and capturing them
as.numeric(gsub("([0-9]+).*$", "\\1", years))

curve <- c("sk_lp_tpr_105.txt")
as.numeric(gsub("([0-9]+).*$", "\\1", curve))

as.numeric(gsub("[[:alpha:]]", "", curve))

x <- gregexpr("^[0-9]+", curve)  # Numbers with any number of digits
x2 <- as.numeric(unlist(regmatches(curve, x)))

# numbers including the dot and comma
regmatches(curve, gregexpr('\\(?[0-9,.]+', curve))

# numbers WITHOUT including the dot and comma
unlist(regmatches(curve, gregexpr('\\(?[0-9]+', curve)))

f0nzie/zFactor documentation built on Aug. 2, 2019, 1:42 a.m.