# facet_wrap throws errors at bad layout specs

    `ncol` must be a whole number or `NULL`, not an integer vector.

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    `ncol` must be a whole number larger than or equal to 1 or `NULL`, not the number -1.

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    `ncol` must be a whole number or `NULL`, not the number 1.5.

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    `nrow` must be a whole number or `NULL`, not an integer vector.

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    `nrow` must be a whole number larger than or equal to 1 or `NULL`, not the number -1.

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    `nrow` must be a whole number or `NULL`, not the number 1.5.

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    Need 3 panels, but together `nrow` and `ncol` only provide 1
    i Please increase `ncol` and/or `nrow`

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    `facet_wrap()` can't use free scales with `coord_fixed()`

# facet_grid throws errors at bad layout specs

    `coord_fixed()` doesn't support free scales

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    Free scales cannot be mixed with a fixed aspect ratio

# facet_wrap and facet_grid throws errors when using reserved words

    "ROW" is not an allowed name for faceting variables
    i Change the name of your data columns to not be "PANEL", "ROW", "COL", "SCALE_X", or "SCALE_Y"

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    "ROW" and "PANEL" are not allowed names for faceting variables
    i Change the name of your data columns to not be "PANEL", "ROW", "COL", "SCALE_X", or "SCALE_Y"

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    "ROW" is not an allowed name for faceting variables
    i Change the name of your data columns to not be "PANEL", "ROW", "COL", "SCALE_X", or "SCALE_Y"

