zwietering_gamma | R Documentation |
Gamma model as defined by Zwietering et al. (1992). To avoid unreasonable predictions, it has been modified setting gamma=0 for values of x outside (xmin, xopt)
zwietering_gamma(x, xmin, xopt, n)
x |
Value of the environmental factor. |
xmin |
Minimum value of the environmental factor for growth. |
xopt |
Maximum value for growth |
n |
Exponent of the secondary model |
The corresponding gamma factor.
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