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Description
If you open the Y-Variable dialog and select the Popup control in the New variable field, the following list of variables will be displayed:

k
z
x
s
e
h
d
v
w
c
Column Index Row Index
Column Index
The Column Index field value in the Y-Variable above is covered by the New variable field Popup control. (There is a similar choice of variables in the X-Variable dialog .) The value of the Column Index field refers to the component of the corresponding vector. Given a vector and column index, its value will be plotted as a function of time index. If the Column index is greater than the length of the vector, the corresponding value in the table will be the bad value flag .

Row Index
The Row Index field value in the Y-Variable dialog above is covered by the New variable field Popup control. The value of the Row Index field is only used for the c variable.

k
This is the time index which takes on integer values between 1 and the number of time points, nk. The only valid Column Index value for k is 1.

z
This is the data vector which is defined the Data file . The Column Index value denotes a data column within the Data file.

x
This is the estimate of the State vector that was determined by the last Fit Command . The Column Index value denotes a component of the State vector.

s
This is the simulated value for the State vector that was computed by the last Simulation Command . The Column Index value denotes a component of the State vector.

e
This is the an estimate of the standard error in the estimate x that was corresponds to the last Fit Command . If xt is the true state value, the ith column of e at time index k is and estimate of
        _____________________
      \/ E[(x (i) - xt(i))^2]
             k        k
The Column Index value denotes the component of the State vector.

h
This is the Measurement function value that corresponds to the State estimate x; i.e.
      h (x )
       k  k
The Column Index value denotes a column within the Data file .

d
This is the simulated State vector minus the estimated State vector; i.e.,
      d = s - x
       k   k   k
The Column Index value denotes the component of the State vector.

v
This is the data minus the Measurement function evaluated at the estimated State vector; i.e.,
      v = z - h (x)
       k   k   k  k
The Column Index value denotes a column within the Data file .

w
This is the actual State estimate minus the predicted State estimate; i.e.,
      w   = x  - g  (x)
       k     k    k-1  k-1
The Column Index value denotes the component of the State vector. It is important to note that this variable is not defined for time index k = 1.

c
If the Row Index field value is i and the Column Index field value is j, this is the correlation between the ith and jth component of the estimate x. To be specific, if xt is the true value of the State vector, it is an estimate of
	   E[ (x (i) - xt (i)) (x (j) - xt (j)) ]
              k        k       k        k
      ---------------------------------------------
       ____________________________________________
     \/ E[(x (i) - xt (i))^2] E[(x (j) - xt (j))^2]
            k        k            k        k