logSpeed {crawl} | R Documentation |
Calculates log speed estimates and standard errors based on the delta
method. Typically this is used within the function
crwPredict
.
logSpeed(predx, predy, varx, vary, polar.coord)
predx |
matrix of longitude state estimates. |
predy |
matrix of latitude state estimates. |
varx |
an array of covariance matrices for predx. |
vary |
ana array of covariance matrices for predy. |
polar.coord |
Logical. TRUE if coordinates are polar. |
data.frame with colums:
ln.speed |
log speed estimate (in meters/time unit if
polar.coord=TRUE . |
var.ln.speed |
log speed estimated standard error. |
Devin S. Johnson