The order of math operations is set incorrectly.
In the script of graphical representation of functions, the order of math operations is incorrectly set in this app. For instance, in the current version,
y = -x^2;
is interpreted as
y = (-x)^2; // Wrong!
Obviously this is wrong interpretation of formula, and is caused by the incorrect math operation order in this app.
It must be interpreted as
y = -(x^2); // Correct!
because "^" the "to the power of" operator precedes "-" the sign operator.
So, in this example unless additional parentheses used around the "x to the power of 2" exclusively to force them have a higher operation order, the formula becomes completely wrong.
When I found this app, I was very excited and immediately had started using it. However, I became very disappointed and frustrated when I had found this problem in the app.
At first I like this app because its script syntax looks almost compatible to Matlab or Scilab those I have used for a long time.
Also it has very nice GUI interface, especially the feature of graphical representation of functions is one of the best features. Also capability of zooming the graphical representation allows user to be able to trace down details of functions without doing any effort on the equations, formulas at all. That was mostly reason for my excitement when I found this app.
So I hope there would be a revision of this app asap that has fixed the problem mentioned above. I am looking forward to seeing that revision soon enough. That's why I am not rating this app as the lowest for now.
y = -x^2;
is interpreted as
y = (-x)^2; // Wrong!
Obviously this is wrong interpretation of formula, and is caused by the incorrect math operation order in this app.
It must be interpreted as
y = -(x^2); // Correct!
because "^" the "to the power of" operator precedes "-" the sign operator.
So, in this example unless additional parentheses used around the "x to the power of 2" exclusively to force them have a higher operation order, the formula becomes completely wrong.
When I found this app, I was very excited and immediately had started using it. However, I became very disappointed and frustrated when I had found this problem in the app.
At first I like this app because its script syntax looks almost compatible to Matlab or Scilab those I have used for a long time.
Also it has very nice GUI interface, especially the feature of graphical representation of functions is one of the best features. Also capability of zooming the graphical representation allows user to be able to trace down details of functions without doing any effort on the equations, formulas at all. That was mostly reason for my excitement when I found this app.
So I hope there would be a revision of this app asap that has fixed the problem mentioned above. I am looking forward to seeing that revision soon enough. That's why I am not rating this app as the lowest for now.
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Wow
This is the worse graphing app.waste of your free(underlined) time.
Sad
It woundn't graph the equation y=12x+3. Two stars because it's free
Absolutely terrible
it gives you one formula that you can't change. Utterly useless
Nothing is perfect
It's a good app for math I don't see a reason for 1stars I would give at least a 4
Excellent formulas
This is a wonderful app that can help even with the most simple problems.
slick app
I do not understand the one-star raters. Some understanding of mathematics is needed, obviously. If you do not have that, don't rate and mislead others.
This is a powerful, flexible, easy-to-use app. The instructions are clear, and the examples are helpful. I think this is a great app. My only criticism is that the numbers along the axes are too small. They should be adjustable.
This is a powerful, flexible, easy-to-use app. The instructions are clear, and the examples are helpful. I think this is a great app. My only criticism is that the numbers along the axes are too small. They should be adjustable.
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Rubbish.
Terrible! I can't even work out what this app is meant to do.
Butt app
Garbage
EPIC FAIL!
I deleted this within 10 seconds of getting it. Just awful. Absolutely awful.
...no.
Im in trig algebra and i dont want to buy a flippin calculator. This calculator failed me in under 2 minutes. Horrible for students
So powerful!
This app is amazing and works great. Looking forward for additional features.
BTW the one star reviewer should revise his algebra: y = x*(x+2) works fine, just don't forget the * for multiplication...
Algebra
Can't compute y=x(x+2)?
Cool
This is a really cool app!!
