Labels

By adding a point to the expression list, you'll automatically have the option to add a label. Enabling the checkbox without adding text will automatically show the coordinates of the point on the graph paper.

    


To create a text label, make sure the "Show Label" checkbox is enabled and type in the text of your choice. The graph paper will automatically update. It's also possible to create labels on movable points

 

Dynamic Labels

If a parameter is already defined in the calculator, then the value of that variable can be used to create dynamic labeling. For example, if m and b are defined in the calculator, then typing {m} and/or {b} in any point label text areas will display the numerical values of m and b. The label will automatically update as the value of m or b changes and can be used with text to great effect. Below, we've used y = {m}x + {b} as a point label in order to display the equation of the line in slope-intercept form as the sliders are moved. 

dynamic_labels.gif

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8 Comments

  • 0
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    Michael Solyom

    Not sure if this is related or not, but since this has been implemented I've noticed a problem with intersecting lines: if I click on the intersection of two lines Desmos will let me know the coordinates in the "old" style black and white label, but if I change a slider that moves either line it loses the label -- it used to automatically update and move along with my changes.

    Here's an example: https://www.desmos.com/calculator/t5tckrsxle

    Where the lines intersect is pretty important when I'm building assignments for my students, and to solve for all seven intersections algebraically to build a "new" style label for each seems a bit excessive to me.

    Is this an issue you're aware of?

    Thanks!

  • 1
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    Bernard Gilroy

    I absolutely love the label feature.  But I'm sad that, as far as I can tell, the labels will not show up on images generated via the share button.  I prefer using that to taking screenshots, but I don't know how to make point labels appear in the png image.

  • 0
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    Filippo Alberto Edoardo Nuccio

    I have the same problem as Bernard: the feature is great, but it would be awsome to be able to export these labels when creating a png image.

  • 0
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    Joshua Begay

    This is an awesome feature! It would be helpful if the coordinate point could be minimized or made invisible. That way we could place a label near features that don't necessarily have a point.

     

    --- Nevermind! Figured it out.

    Edited by Joshua Begay
  • 0
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    WeThotUWasAToad

    Joshua, I have exactly the same question (ie hiding the actual point so only the label is displayed). I'm glad you "figured it out" but can you explain the solution? Thanks.

     

     

  • 0
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    Joshua Begay

    WeThotUWasAToad,

    Add your label then un-select the point by clicking on the colored circle (circle in red). This will turn off the point but leave the label. The label will move around depending on the zoom.

    p.s. DO NOT SEEK THE TREASURE!

    Edited by Joshua Begay
  • 0
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    Williamh22114065

    How do you label a function?

     

  • 1
    Avatar
    Josh Hill

    How do you label a line?

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