Excel 2000 Simulations

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Excel Simulations - 1

[1]

We are going to look at a number of ways Excel can be used to create

worksheet simulations that help students visualize concepts. The first typeof simulation we will create will use a formula to calculate the data points tobe plotted. The second simulation uses experimental data to produce its

plot.

The formula example will have two variables although you could use

any number of variables. Each variable cell will be connected to a slider barthat changes its value. The variables are then used by formulas to create a

range of data that is graphed. To run the simulation you move the sliderbars which alters the variables producing new range values and updating the

graph.

The experimental example will use three variables although again youcould use any number. Experimental data is placed in a numbered range

and the variables select a subset of this data. To run the simulation youmove the slider bar which alters what values the variables contain and

updates the graph.

[2]

Type this into Microsoft Excel. The current value of variable 1 is 288

and variable 2 is 76. We are going to divide our variables by thevalues on row four (1000 and 100). The values in row five (50 and 2)

will be used as starting values for our formulas.

(1) Type text

and numbers


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[3] Format the cells that contain constants.

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[4] Choose light blue for cells.

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[5]Enter =A6-B6 in cell C6. We are going to subtract the value

generated by variable one by the value generated by variable two.

(1) Enter formula

[6]

Enter =A5*(A$2/A$4+1) in cell A6. Currently This formula divides288 by 1000 adds one and and multiplies by 50. The reason for using

the dollar signs in front of the row numbers is to insure the rownumbers dont change when the formula is copied.

(1) Enter formula


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[7] Drag fill handle to copy formula from cell A6 to cell B6.

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[8]Select A6 to C6 and then drag fill handle to copy the formulas down

to row 15.

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[9] Reduce first three columns to a width of 6.

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[10] Change the format of all cells in the first three columns.

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[11] Make the cell format Number with 0 places after the decimal.

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[12] Select the numbers you want to make into a graph.

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[13] Create chart.

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[14] Select 3-D line chart.

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[15] Finish Chart.

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[16] Delete the legend.

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(2) Press delete


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[17] Increase the size of the chart.

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[18] Select wall.

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[19] Remove wall color.

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[20] Change variable 2 to a value of 30.

(1) New value


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[21] Display the Visual Basic toolbar called Control Toolbox.

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[22] Add a scroll bar.

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[23] View properties of the selected scroll bar object.

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[24]Set the linked cell to A2 (variable 1) and the maximum value it can

contain as 300.

(2) Type 300

(1) Type A2

3


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[25] Add a second scroll bar under the first one.

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[26]Set the second scroll bars linked cell as B2 (variable 2) and the

maximum value it can contain as 200.

(2) Type 200

(1) Type B2

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[27] Drag the scroll bars to change the variable values.

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[28]The formula results change and a new graph is displayed. Switch to

sheet2 where we will create another type of dynamic graph.

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[29]Enter the text and formulas on sheet2. This type of dynamic graph

can be used when you want to display values that have beenrecorded during an experiment.

(1) Type text

and numbers

[30] Use the fill handle to number the series.

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[31] Use the growth trend function on variable one

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[32]Complete the series for variable two and three. Note variable two

and three are linear.

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[33]

Add a formula that looks up the value in the table based on cell A2. This verticallookup command has four parts lookup cell ($A2), table area ($A4:$D14),

column selected (2) and exact match (TRUE). Excel matches values in the firstrow of the table with the lookup cell and returns the selected column value.

(1) Add Formula

[34] Copy the formula to columns C and D.

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[35] In cell C2 change the 2 in the formula to a 3.

1 (2) Enter 3

[36] In cell D2 change the 2 in the formula to a 4.

1 (2) Enter 4


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[37] Insert the scroll bar that will be linked to cell A2.

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[38] Change the properties of the scroll bar.

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[39]Set the scroll bar linked cell as A2 and the maximum value it can

contain as 10.

(2) Type 10

(1) Type A2

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[40]Turn design mode off and close the Control Toolbar. Select cells B2

to D2 as the cell to be used for the creation of a chart.

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4 2


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[41] Insert Chart.

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[42] Select a cone chart.

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[43]

Chart the data by columns.

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[44] Turn off the legend.

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[45]Drag the scroll bar to alter cell A2. The formulas in cells B2 to D2 will

recalculate and a new graph will be drawn.

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[46]Stop the scale from changing. Because the scale automaticallyupdates it is difficult sometimes to see changes take place on the

graph.

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[47] Turn off automatic scaling to prevent the graph from jumping around.

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[48] Drag the scroll bar box down.

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[49]Note the value for variable one is off the chart because we have set

scale to manual.

Excel 2000 Simulations

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