Grapher improvements

Editing an expression is now done directly in the cell that contains it.

Editing an expression directly in the cell

The calculator is now able to plot a list of points in the form of {(1,3),(2,3),(3,5)}. It is also possible to plot a single point in the form of (1,3).

Plotting points

You can now plot the scatterplot from the data in the Regression application by typing, for example (X1,Y1).

Scatterplot in the grapher

Furthermore, the Grapher now plots the polar line whose equation is in the form θ=a.

Drawing polar curves of the form theta = number


When a linear system has infinitely many solutions, the calculator now gives the parametrized form of the solutions.

Linear system with infinite solutions


In the Distributions application, it is now possible to calculate the value of μ or σ from a Normal probability distribution.

To do this, simply leave the value to be calculated (μ or σ) blank in the second step and then enter the value of the probability. The calculator will then give the requested value below the graph.

Calculation of mu from a probability value for the normal distribution

Regression and Statistics

The Regression application now automatically creates the function corresponding to the chosen model. You can find it in the Variables menu. This makes it possible to use the function in other applications such as the Grapher.

Plotting the regression function in the plotter

The calculator now reports the standard deviation of residuals in the Stats tab of the Regression application.

Calculating the standard deviation of the residuals

The Data tab now remembers the formula used when the user generated a column from a formula.

Editting a formula used in statistics and regressions

You can now input a value when viewing the cumulative frequency plot and jump to the point on the graph.

Inputting a value into the cumulative frequency plot

numpy module

It is now possible to use the numpy module of python. This module allows you to use arrays of 1 and 2 dimensions. You can now manipulate tables of numbers.

The functions available in the numpy module are listed in the Modules section of the toolbox key menu as well as in the Catalog.

Numpy section of the toolbox

In addition, the gcd() function has been added to the math module.

But wait, there's more!

This version also offers many other improvements.

The Table tab of the Sequences application now gives the possibility to display a column of the sum of the terms of the sequence.

Column of the sum of terms in Sequences

Pressing the log key now displays the base number 10. The base number can then be easily adjusted.

Pressing log key display base number

When you use a trigonometric function in radian mode and the argument appears to be in degrees, the calculator reminds you that the angle unit is set to radians, and vice-versa.

Ambiguity of the angle unit used

You can now activate exam modes within the Settings application. Learn more about exam compliance.

Activating the Keystone exams

Finally, when the device is at the lowest battery level, the red battery icon in the status bar flashes for a few seconds to remind the user to recharge the calculator.