William Stein wrote:
> On Tue, Sep 16, 2008 at 3:56 PM, Jason Grout
> <[EMAIL PROTECTED]> wrote:
>> I'm writing an @interact to solve simple 2nd order differential
>> equations and plot solutions. In it, I'd like to typeset the formula:
>>
>> show(a*diff(y,t,2)+b*diff(y,t)+c==0)
>>
>> However, what shows up is the word "diff" when I'd really like to see
>> math notation for a partial or total derivative (depending on the
>> independent variables declared for y). Is there a nice way to get it to
>> show up?
>>
>> Note that just printing a string doesn't work so well, since a, b, or c
>> might be negative and then you get something like
>> 3(d^2y/dt^2)+-2(dy/dt)+-3=0.
>>
>> For reference, the current (non/barely) working code is:
>>
>> var("x,t")
>> @interact
>> def _(y0=(0,4,1/5), y0p=(0,4,1/5),a=(-4,4,1/5),b=(-4,4,1/5),c=(-4,4,1/5)):
>> y=function('y',t)
>> show(a*diff(y,t,2)+b*diff(y,t)+c==0)
>
> Though ugly to input, I would be tempted to do something like this,
> since the output looks superb:
>
> a = sin(x); y = cos(x^2) + e^(3*pi*x)
>
> html("$$%s \cdot \\frac{d^2}{dt^2}\\left[ %s \\right]$$"%(latex(a), latex(y)))
Thanks. Gee, it'd be nice if there was a %l for latex(object), just
like there is currently a %r and %s which encapsulate calls to
str(object) and repr(object)
That might be changing the language too much, though. If it's a good
idea, someone give it a +1.
Thanks,
Jason
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