stds {assignR}

data: documentation of keratin H and O isotope standard calibrations

Description

This data object contains information on keratin H and O isotope standard materials and calibrations used across multiple laboratories since the year 2000.

Usage

data("stds")

Format

list.

hstds

data.frame with 18 fields.

[, 1]

Calibration: Calibration code

[, 2]

High_ID: Identifier for high-value standard

[, 3]

High_material: Description of high-value standard material

[, 4]

High: Mean hydrogen isotope value of high-value standard

[, 5]

High_sd: Standard deviation of calibration data for high-value standard

[, 6]

High_n: Number of calibration data for high-value standard

[, 7]

High_se: Standard error of the calibrated mean for high-value standard

[, 8]

Low_ID: Identifier for low-value standard

[, 9]

Low_material: Description of low-value standard material

[, 10]

Low: Mean hydrogen isotope value of low-value standard

[, 11]

Low_sd: Standard deviation of calibration data for low-value standard

[, 12]

Low_n: Number of calibration data for low-value standard

[, 13]

Low_se: Standard error of the calibrated mean for low-value standard

[, 14]

Ref_scale: Calibration scale against which the values for this calibration are anchored

[, 15]

Citation_val: Source for the calibrated values

[, 16]

Citation_cal: Source for the methodology used for this calibration

[, 17]

Treatment: Description of calibration procedure

[, 18]

H_calibration_comments: Comments

ostds

data.frame with 18 fields.

[, 1]

Calibration: Calibration code

[, 2]

High_ID: Identifier for high-value standard

[, 3]

High_material: Description of high-value standard material

[, 4]

High: Mean oxygen isotope value of high-value standard

[, 5]

High_sd: Standard deviation of calibration data for high-value standard

[, 6]

High_n: Number of calibration data for high-value standard

[, 7]

High_se: Standard error of the calibrated mean for high-value standard

[, 8]

Low_ID: Identifier for low-value standard

[, 9]

Low_material: Description of low-value standard material

[, 10]

Low: Mean oxygen isotope value of low-value standard

[, 11]

Low_sd: Standard deviation of calibration data for low-value standard

[, 12]

Low_n: Number of calibration data for low-value standard

[, 13]

Low_se: Standard error of the calibrated mean for low-value standard

[, 14]

Ref_scale: Calibration scale against which the values for this calibration are anchored

[, 15]

Citation_val: Source for the calibrated values

[, 16]

Citation_cal: Source for the methodology used for this calibration

[, 17]

Treatment: Description of calibration procedure

[, 18]

O_calibration_comments: Comments

ham

matrix. n x n symmetric, where n is the number of calibrations represented here and in stds$hstds.

oam

matrix. n x n symmetric, where n is the number of calibrations represented here and in stds$ostds.

References

Magozzi, S. et al. (in press) Calibration chain transformation to improve the comparability of organic hydrogen and oxygen isotope data. Methods in Ecology and Evolution

Examples

library(graphics)
data("stds")

print(stds$hstds[, 1:5])
print(stds$ostds[, 1:5])
image(stds$ham)
image(stds$oam)