ZerO

its written sorry.

these equations valid for design lift coefficient of 0.3
which means the first digit is 2

yes thanks ,

calculator here because it does calculate yes , the function name is calc .

while pressing enter or anywhere else out the edit area , the matlab excutes the edit area callback function , this is how the edit area in matlab gui works , so ,
pushing the pi button generate a syntax error yes , only if u type in the edit area with your keyboard and delete what you just wrote , once you press enter or any bushbutton , the matlab automatically excutes the edit area call back function , which means getting the string written in the edit area , which is a
 1-by-0 empty matrix , and then trying to evaluate it , sure you will have a syntax error here , which is a one second message to declare your input error and to reset the edit area to try again.

this problem can be solved by many ways , the most easy one , you can set the edit area enable off , and use the mouse to write down the equation you want .

matlab does not understand what 3.4 sin means , like in the matlab command window , you have to type sin(3.4) .

this can be solved by many ways , the most easy one , is to set the sin button call back function to get the string in the edit area first , put the brackets around it , and get its sin then display result in the edit area , you can make a simple check function to check the input arguments , feel free to add/delete anything .

1) Are you really claiming that the word Calculator is a registered trademark of yours? Hard to believe.

2) Pushing the pi button generates a syntax error.

3) Pushing the function buttons appears to only populate the display with the function name, not actually do the function. So to do sin(3.4), for instance, you do not simply type in 3.4 and then push the sin button. You have to push the sin button first, then click in the display area, then type in (3.4), and then press Enter or click the = button. Frankly, it is easier just to type in the whole thing by hand rather than use the function buttons at all. And the button usage is counter intuitive compared to regular hand held algebraic calculators.

4) The accuracy of the result is apparently contained in the display string itself. i.e., you only get 6-7 decimal digits of accuracy. Why isn't the result maintained internally to full precision?

Overall, I would have to rate this as cute but not much else.