# iemisc

R package that contains Irucka Embry's miscellaneous functions:

• statistical analysis
• RMS,
• coefficient of variation (CV),
• approximate and relative error,
• range,
• harmonic mean,
• geometric mean,
• maximum mean relative error (MAXRE),
• and mean relative error (MRE)];
• engineering economics
• benefit-cost,
• future value,
• present value,
• annual value,
• interest,
• periods,
• etc.;
• geometry
• polygon area,
• sphere volume,
• and right triangle validation;
• civil & environmental/water resources engineering
• Concrete Mix Design for Normal Strength & Structural Lightweight Concrete,
• Construction Measurements with and without Fractions,
• Engineering Surveying Calculations,
• Air Stripping,
• Saturated Vapor Pressure for Ice and Water,
• Density of Water,
• Dynamic and Kinematic Viscosity of Water,
• Specific Gravity and Volume,
• Unit Weight,
• Surface Tension of Water,
• Weighted C Factor,
• Weighted Curve Number,
• Darcy friction factor (f),
• the Reynolds number,
• Manning's n,
• Gauckler-Manning-Strickler equations for open channel flow,
• Modified Rational Method Equation,
• Linear Surface Area calculation,
• Rain Garden sizing based on driveways;
• negation of chin from data.table and negation of in from base R (%notchin%);
• quick search (%qsin%);
• mortality rate calculations;
• proportion solver;
• sum of all digits in a vector to a single integer;
• string manipulation (splitcomma and splitremove);
• a version of linear interpolation for use with NAs;
• Python compatible floor division function (%//%);
• GNU Octave/MATLAB compatible trigonometric functions in degrees; and
• GNU Octave/MATLAB compatible
• section properties (secprop),
• remainder (Rem),
• modulus (Mod_octave),
• number of dimensions (ndims),
• row vector (isrow) and column vector (iscolumn) tests,
• fractional differences (fractdiff),
• size,
• numel,
• and length functions.

This package can be used in academia by students and faulty alike and/or in professional settings.

# Installation of iemisc from CRAN

``````install.packages("iemisc")
``````

# Help

With credit due to the `matlab` package, for a complete list of functions and the package DESCRIPTION file, use `R library(help = "iemisc")`

With credit due to Getting Help with R for the following 2 methods of help:

`R help(shm, package = "iemisc") # sample harmonic mean function help`

`R help(package = "iemisc") # help for the iemisc package`

# Vignette Viewing

If you wish to browse the `iemisc` Vignettes, please copy-and-paste the following code into R:

``````library(iemisc)

utils::browseVignettes("iemisc")
``````

# Examples (see more examples in the vignettes and in the functions)

``````
# 1)

set_n(200) # makes the example reproducible

samp <- r_norm(.seed = 200) # sample

# Calculate the sample harmonic mean (SHM) of the 200 values
# Using the default value of na.rm = FALSE
# using a matrix of the numeric vector obs1

samp1 <- matrix(data = samp, nrow = length(samp), ncol = 1, byrow = FALSE,
dimnames = list(c(rep("", length(samp))), "Sample"))

shm(samp1)

# 2)

# Compute the relative error of the 210 values
set_n(210) # makes the example reproducible

true <- r_norm(.seed = 210) # true

approx <- r_norm(.seed = 210) # approximation

relerror(true, approx)

# 3)

library(iemisc)

# Are any of the following right triangles?

righttri(2, 7) # a = 2, b = 7

righttri(a = 4, c = 11)

righttri(b = 4, c = 5)

# 4)

library(iemisc)

# What is the future worth of \$2,390.90 in the present 13 years from now with a
# 0.25% interest rate compounded annually?

FgivenP(2390.90, 13, 0.25, frequency = "annual") # the interest rate is 0.25%
``````

# Disclaimer

`iemisc` is distributed under the GPL-3 (or later) license, as stated in the DESCRIPTION file. For more info, see the GNU General Public License (GPL) page.

# Citation

Please refer to the CITATION for the correct way to cite `iemisc`.

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iemisc documentation built on May 4, 2023, 9:09 a.m.