Efofex Cloud – February 2017

In February 2017, Efofex will be releasing new cloud-enabled versions of our popular mathematics products. They allow you to create, use and edit Efofex graphics just about anywhere. Stay tuned for more details.

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Our Products Reporting That Windows Files Are Missing


FX Draw is not running after installation. It is saying that api-ms-win-crt-runtime-1-1-0.d11 (or similar) is missing. What’s happening?


We have recently started compiling our products for Windows 10, but this creates dependencies on new files. These files SHOULD have been automatically updated on your older version of Windows but some computers have not been updated correctly (or in the case of some school computers, at all) and the files are missing. They are not our files, they are Microsoft’s.

We are currently deciding whether we should add the required files to our installer but we would like to avoid this as they add significantly to the size and are not necessary for most users.

For the moment, if you have installed one of our products and see a failure like this, download and run the required packages from Microsoft using this link.


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Code Not Sticking? Try a Fresh Download


I am entering my FX MathPack code but the product is not recognising it. What should I do?


About a year ago we had to make a small change to our registration code system. The codes look the same but the old system had a small flaw that was preventing us from generating expiry dates past 2018 – so a change had to be made.

Some older versions can cope with the new codes (we had anticipated the change a year earlier and started building in the capability) but many schools are still using old versions that predate the change.

So… If you are entering your new FX MathPack code but it is being rejected (or seemingly forgotten) by the products, try downloading fresh versions. It will almost certainly fix the problem AND you will be getting all of the latest features, fixes and improvements.

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Sinusoidal Regression and Data Generation

We have added a new sinusoidal data generator and regression calculation to FX Stat and FX Draw. They have been included in the latest uploads.

Data Generator

The new data generator is available from the data generator toolbar.

Simply enter the parameters you wish FX Stat/FX Draw to use for the sine curve, select an amount of “noise” to add to the data and push OK.

A bivariate data set is produced that can be graphed on a scattergraph.

At the moment, FX Stat is trying to fit a linear regression equation to the data (not very successfully!) By right clicking on the graph, we can change the regression equation in use.

By selecting Sinusoidal Regression, FX Stat will fit a sine curve to the data.

The summary statistics pane will offer you a number of versions of the curve’s equation.

All of these equations are equivalent.

Please note that the calculation of sinusoidal regression equations is not as simple as other regression equations and there are always a number of possible solutions. FX Stat/FX Draw will produce an equation with the longest possible cycle-length (you could, for example, produce a sine curve with a far shorter period than the one shown above that actually “fits” the data better) and the results are similar to those produced using other tools like graphics calculators. There are some cases however, particularly if you have multiple cycles worth of data, where FX Stat/FX Draw may find a solution you were not expecting.

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New Circle Points Feature

The same user that suggested the conic section tools also suggested this new feature.

FX Draw 6.003.2 also includes a new feature which adds point to circles.

Draw a circle and select it. When you right click on the circle you will be offered a new suggestion to add dividing points.

Tell FX Draw how many points to add.

FX Draw will add the points to the circle.

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New Conic Sections Tools for FX Draw

These new features were inspired by a user suggestion (thanks MS).

We have uploaded a new FX Draw (V6.003.2) that includes three new conic sections tools.

These allow you to quickly and easily draw conic sections using the locus model.

We have also updated the three ellipse tools so that they can mark their own vertices, axes, foci and directrices.

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New Line Division Feature for FX Draw

We have added a new feature to FX Draw. The new feature has been included in the 6.002.0 release.

You can now divide any line by adding dividing points to the line.

First select the line, then right click on it and choose Add Dividing Points…

Now enter how many parts you wish to divide the line into. You can also choose to add points to the ends of the line.

The points are attached to the line and will move with it.

You can also delete the line and the equally spaced points will remain on the canvas.

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