User interface

Here is where all formulas and calculations are written. By default, when you open a new CalcMe session, you begin writing in this area. The whole area is organized into lines, like a piece of ruled paper. You write calculations, one in each line.

Initially, a new line has an empty box with a cursor inside it, ready to accept new formulas. You usually write a formula and then press an Action to get a result. So, you'll have each Formula, Action, and Result in one line.

Each line has three buttons on the right:

To insert a new line between two existing ones, you can click on the narrow space between the lines. You can rearrange the lines, drag a line and drop it to the new place. Try a calculation now:

You can expect any formula that a scientific calculator would understand to be calculated here. However, CalcMe also carries out symbolic computations. If you write a letter such as a,b,c,x,y, etc., it will be treated as a "variable". For example:

To insert special symbols such as roots, fractions, etc., use the Toolbar or the Menu.

CalcMe can graph functions, equations, inequalities, and points. Initially, there is no graph, but one is created when you use the Plot action. Try it yourself:

Thus, the sheet can have an area on the right to show graphics. Once there is a graph, it comes with several options to configure it. You can see them together with more details about creating these graphics in the following section. Furthermore, we can draw directly on the grid as we would on a sheet of paper. Please take a look at its dedicated page.

From now on, there are two different procedures to define variables in CalcMe The first one, the usual within the sheet, is intended for those who use CalcMe like a simple calculator. The second one, using the code editor, is thought of for those who use the calculator to generate long algorithms, whether in a WirisQuizzes algorithm or not.

CalcMe sheet	CalcMe code editor

Each line has an area on the left where you can define variables and functions.

CalcMe sheet
CalcMe code editor

CalcMe sheet	CalcMe code editor

A session can have multiple sheets. Initially, there is just one sheet, but you can add more by using the New sheet button. It's the one with a plus (+) sign located to the right of the session title. Each sheet has a name --by default, Sheet 1-- located to the right of the session title. You can change the name by clicking on it.

When you Save or Open a session, all its sheets will be saved or opened as well. You can move between sheets using the tabs on the upper left. You can rearrange the sheets by dragging and dropping the tabs. You can delete a sheet using the corresponding button in its tab. There is no interrelationship among the sheets, so the variables defined in one sheet aren't reflected in another.

Frequently used operations have buttons in the toolbar for faster access.

Most frequently used operations
	Fraction
	Power
	Square root
	Newline

Given a formula, you can perform multiple Actions on it. Actions are big buttons, each with an icon and a name. The general actions are in the Toolbar unless Calc which can be found at the lower right corner.

Actions
	Calc
	Approx
	Simplify
	Factor
	Substitute
	Verify
	Derivate
	Integrate
	Plot
	Plot 3D
	Text
	Add image
	Insert code editor
	Transform Sheet to Algorithm

Some actions are configurable, and some are not. You configure an action by clicking its symbol in the line. This symbol is placed between the initial formula and the calculated result. For example, you can change the colour of a function graph by clicking the Plot symbol of a line.

After reconfiguration, the line is automatically recalculated. Each time you recalculate a line, all other lines will also be recalculated.

The Text action is special: It doesn't act on an existing formula but instead creates a new line to contain text that will not be calculated. You can use it for comments. Text lines have light-green borders. See Format for text options.

The most common action is Calc. It does different things depending on the input:

The language used in CalcMe is guessed from various sources when you open it. Of course, you may also choose any of the supported languages. Select the Save settings as defaults in cookies option if you want to make the change permanent (on your internet browser).

Below is a complete list of supported languages, noting when the commands are available.

Unit of angle: As with a handheld calculator, in CalcMe, you can work with angles in one of two modes:

Whether CalcMe will use radians or degrees to evaluate trigonometric expressions when the unit is not specified (therefore, sin(90°) and sin($\frac{\mathrm{\pi }}{2}$ rad) will be the same regardless of this option, but the result of sin(90) will depend on which option has been selected here). The result of inverse trigonometric functions will also have this unit. Notice that this change also affects plots, integrals, and derivatives of trigonometric functions.

Unit of angle
Unit of angle: radians	Unit of angle: degrees

When you use a direct trigonometric function (e.g., sin(2)), the input angle is assumed to be in radians or degrees, according to the mode. When using an inverse trigonometric function (e.g., arcsin(0.5)) the result angle should also be interpreted according to the mode. See the trigonometric functions section. Commands argument() and polar() for complex numbers are like arctan(), and their results are also according to the mode.

Imaginary unit: Whether i or j will be used as the output imaginary unit variable in CalcMe. To input an imaginary unit, one must use the buttons i and j; they both work and mean the same regardless of this option.

Imaginary unit
Imaginary unit: i	Imaginary unit: j

Times operator: This option allows the user to select the default output times operator in CalcMe. All possible forms work as input. If the implicit option is selected, the dot will be used when there cannot be an implicit times operator (between two numbers).

Times operator
Times operator: x Cross	Times operator: · Dot	Times operator: Implicit

Precision & precision type: The number of significant digits or decimal places to be used in the output. If the precision type is decimal places, the notation will be automatically set to Decimal. You can set the number of significant digits to be shown when results have decimal numbers. The valid values are from 1 to 15, which is the maximum. Like the round() command, the last digit is rounded to nearest with half-up tie-breaking, just like the round() command.

Precision
Significant figures: 5	Significant figures: 10
Decimal places: 5	Decimal places: 10

Output notation: Sets the output notation to be scientific or decimal or asks the kernel to decide in every case automatically. Note this does not apply to integers, and all input forms are supported regardless of this option.

Output notation
Decimal	Scientific

Decimal, digit group, and list separators: No symbol can be used as a separator of two different things simultaneously. These options affect both input and output. Changing them automatically updates both inputs and outputs to work with the new settings.

This setting is optional, but if it is not set, the CalcMe settings will revert to the default settings for the following CalcMe session.

To save online, just press File > Save and click the To Google Drive button:

When you save a session for the first time, you'll be prompted to log in and give CalcMe permission to associate with your Google Drive. Probably, you will receive an email from Google reporting the assigned permissions.

Once logged in, you can see your profile photo in the title bar, shown at right.

You can also make sessions opened from Google Drive automatically take you to CalcMe In Google Drive, just go to Settings > Managing apps, and tick Use by default next to CalcMe

Additionally, once you've associated CalcMe to your Google Drive through the above steps, you will be able to open new CalcMe files directly from Google Drive. Just go to New in the top left corner > More > CalcMe:

To save sessions offline (directly to your device), click on File > Save and choose the option To Device:

This downloads a CalcMe session file, which you can then open again with the Upload button in the same drop-down menu.

The formula will be copied; this way, you can reuse formulas and results.

The variable in the second formula is substituted by the value in the first one.

The variable in the first formula will be defined from this point forward.

The formula will be plotted in a new plotter.