Basic text entry

The next update will include an option for "Basic text entry".  What does that mean?  Well currently expressions are formatted as you enter them.  Division is shown with a horizontal bar separating the dividend and divisor, and exponents are displayed in the superscript position.  This is similar the the way you would write down the expressions on paper.  However, not everyone may prefer this input method, especially if you are using a physical keyboard.

The basic text entry will act more like a text box for entry.  Division will use the '/' character and exponents will use the '^' character.  In addition, when in basic text entry you will be able to paste expressions from the android clipboard.  For example, if you see the expression sin(pi/2)^2 in another android app, you can copy it from that app and paste it into our calculator (you can only paste it if you are in basic text entry mode) to execute down.

Results will always be displayed in the current formatted way.  Another addition to the update, is anytime you copy the formatted result, it will be placed in the android clipboard as text.  This way you can copy results into other apps.

More information about this new entry will be posted in a tutorial on the website when the update it released.

Version 1.12

I have just uploaded version 1.12 to Google Play.  This adds logarithmic scaling to graphing.  It also adds an option to display graph reading points (such as intersections and roots) on graph.  Unfortunately asymptote readings aren't going to be added in the near future.  I soon realized after the last post that it was going to be more work to put them in then i originally thought.  It will also be easier to add them in after some other features are added.  For this reason, they won't be added in the near future, although I do hope to eventually add them.

Version 1.11.3

I just uploaded version 1.11.3 to Google Play.  This adds peak and trough readings to graph.  It also fixes some bugs.

There are are few more things that I wan't to add to graphing in the next update or two.

1. Asymptote reading.
2. Logarithmic scaling.
3. Display reading points on traces when the down arrow is hit to hide the reading tab.  Just like markers will draw their position when the readings tab is hidden, other readings will also show their location and reading on traces when the readings tab is hidden.

Small Update

There will be a small update this weekend.  This update will remove the help page and add a short tutorial in the app.  There will also be some bug fixes.

Version 1.11

Version 1.11 is now live on Google Play.  This removes the "y=" from the graph equations so you can now graph inverse functions, circles, hyperbola, and more.  Also this adds polar and parametric graphing to the paid version.

Graph Improvements

I am working on improving graphing for the next update.  Currently, you are forced to enter equations in the format y=...  In the next update this will change.  The "y=" part will be removed so you are free to enter equations such as x^2+y^2=1 to draw a circle.  You can also enter equations to draw ellipses, hyperbola, and inverse functions.  For example, you could graph y=x^2-2x+1 and then graph the inverse at the same time by swapping x and y to graph x=y^2-2y+1.

In addition, there will be some improvement to how the traces are drawn.  For example, when you currently graph y=tan(x) and zoom out far enough, you will not see y go to + and - infinity when x=pi/2.  Instead the trace will just stop at a random y value and the start again at some -y value.  This will be fixed and now y=tan(x) will always be drawn off the top and bottom of the screen when x=pi/2.

I am also working to add the ability to graph parametric equations and polar coordinates to the paid version.

Version 1.10

Version 1.10 is now available on Google Play.  This adds copy/paste, option to clear history, and fixes some crashes.