geoquimica v.0.1.0-alpha

In this inaugural version of the package, 'geoquimica' brings four basic functions for helping on the pre-processing step of geochemistry analysis. All functions start with the "elem_" prefix:

• elem_fillrate: returns a data.frame with two variables, the name of the input columns and the proportion of non-censored or missing values.
• elem_select: filter the variables based on the proportion of non-censored or missing values.
• elem_imput: imputes censured or missing values of the lower detection limit by a number, product of the multiplication of the lower detection limit by a factor.
• elem_norm: returns the data normalized by the chosen method - "minmax", "log10" or "centered log-ratio".