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In this example, the TeLiTab is addressed in the Dataslot. The function y is defined as y = DIFF(1, 2, "XC", "YC", x, 1) With the following Telitab set in the Data slot:

|DIFF1|
0
2
"XC" "YC"
"1" 1 1
"2" 2 4
"3" 3 9
"4" 4 16
"5" 5 25
"6" 6 36
"7" 7 49
"8" 8 64
"9" 9 81
"10" 10 100|

For x = 2.5, the function returns

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DataSet2# = TEXTITEM$(1) 

With in its dataslot:

TEXTITEM1= |0
 3   "X" "Y" "Z"
"1"    1   1   2
"2"    1   4   8
"3"    1   9  18
"4"    1  16  32
"5"    1  25  50
"6"    1  36  72
"7"    1  49  98
"8"    1  64 128
"9"    1  81 162
"10"   1 100 200
"11"    2   1   12
"12"    2   4   18
"13"    2   9  118
"14"    2  16  132
"15"    2  25  150
"16"    2  36  172
"17"    2  49  198
"18"    2  64 1128
"19"    2  81 1162
"20"   2 100 1200
"21"    3   1   22
"22"    3   4   28
"23"    3   9  218
"24"    3  16  232
"25"    3  25  250
"26"    3  36  272
"27"    3  49  298
"28"    3  64 2128
"29"    3  81 2162
"30"   3 100 2200|

And use the following relation to determine the derivative:

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With Input_Value_x = 1, Input_Value_y = 2 and OptionalDirivNo = 2 this gives Calculated_Value=2

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