math program that I can enter math functions ...
Whats language (I know c++, and some others) (I prefer interpreted and free for speed of "seeing") or program that I can enter functions in it, and have compositions of functions, and able to call a function like
F(3) and it would tell me the value there. Thanks! |
You want octave
this is a math script language similar to mathematica and matlab only it is GPL. It is available from repositories if you run a debian or rpm based distribution. (Please edit your profile to show your location and distribution, thanks.) |
Try bc(1). The manual:
http://www.gnu.org/software/bc/manual/bc.html |
Hi!
I am new to here. My friend show me this useful website. I hope anyone here could help me out. Ive tried to learn MATLAB. When i test it with my lecturer's file, i didnt score full mark. Please guide me through. build-in function-functask2=sinh(x)-x.^2+x+1, xvalues=[1x50 double]. 1) i need to compute the function at these xvalues and store in yvalues. 2) find best fit,quadratic n cubic to these values. Store the polynomial coefficient in linecoef, quadcoef and cubiccoef. 3) find new vector of x values,xnew,where there are 5 equispaced points betw each of the values in xvalues. 4) evaluate the polynomials and the function at xnew, store in yline, yquad, ycubic and yfunc. 5) do a cubic spline interpolation betw xvalues, yvalues, to find output values ynew at xnew. 6) overlay all 5 curves in a single plot. my file is: function out2=task2(in2) %%% Compute what is originally in the workspace for task2. out2=in2; %%% Let x be a cell array containings the xvalues. %%% Evaluate the function at x and compute them %%% in yvalues. x=in2.xvalues; out2.yvalues=eval(in2.functask2); %%% Compute the best fit straightline, %%% quadractic and cubic to those yvalues. %%% out2.linecoef= polyfit(x,out2.yvalues, 1); out2.quadcoef=polyfit(x,out2.yvalues,2); out2.cubiccoef=polyfit(x,out2.yvalues,3); r=numel(x); xnew=linspace(x(1),x(end),6*(r-1)+ 1); out2.xnew=xnew; out2.yline=polyval(out2.linecoef,xnew); out2.yquad=polyval(out2.quadcoef,xnew); out2.ycubic=polyval(out2.cubiccoef,xnew); x = xnew; out2.yfunc=eval(in2.functask2,xnew); ynew=spline(in2.xvalues, out2.yvalues, x); out2.ynew=ynew; figure(2); clf reset; plot(xnew,ynew,'b', xnew,out2.yline, 'g',... xnew,out2.yquad, 'y', xnew, out2.ycubic, 'k',... xnew, out2.yfunc, 'm'); title( in2.functask2); legend('vector', 'best fit line', 'quadratic',... 'cubic', 'function'); My up-2-date file is: function out2=task2(in2) out2=in2; x=in2.xvalues; out2.yvalues=eval(in2.functask2); % To find the best fit straightline, quadratic % and cubic at yvalues. % Store them as polynomial coefficients in linecoef, % quadcoef and cubiccoef respectively. out2.linecoef= polyfit(x,out2.yvalues, 1); out2.quadcoef=polyfit(x,out2.yvalues,2); out2.cubiccoef=polyfit(x,out2.yvalues,3); % To find a new vector, xnew. % xnew contains values in x. % xnew has 5 equispaced points between % each of the values in x. [x_val,y_val]= size(x); % x_val the number of rows and y_val the number % of columns in x. aa=cell(1,(y_val-1)); % creates a 1-by-(y_val-1) cell array of empty matrices. for i=1:(y_val-1) if i==1 aa{i}=linspace(x(i),x(i+1),7); else % if i is not equal to 1 xx=linspace(x(i),x(i+1),7); xxx=xx(2:end); aa{i}=xxx; end end xnew=[aa{1:end}]; out2.xnew=xnew; % To evaluate the polynomials and functask2 at xnew. % store them in yline, yquad, ycubic and yfunc % respectively. out2.yline=polyval(out2.linecoef,xnew); out2.yquad=polyval(out2.quadcoef,xnew); out2.ycubic=polyval(out2.cubiccoef,xnew); x = xnew; out2.yfunc=eval(in2.functask2,xnew); % To perform cubic spline interpolation between % xvalues and yvalues. % computes the values at xnew and store them at ynew. ynew=spline(in2.xvalues, out2.yvalues, xnew); out2.ynew=ynew; % To plot a graph on figure(2) showing the 5 curves. figure(2); clf reset; plot(xnew,out2.ynew,'b', xnew,out2.yline, 'g',... xnew,out2.yquad, 'y', xnew, out2.ycubic, 'k',... xnew, out2.yfunc, 'm'); title(in2.functask2); legend('vector', 'best fit line', 'quadratic',... 'cubic', 'function'); cheers!! please help me out. ZUs. |
Maple is my favorite Math Program.
I don't know about languages though -- to me saying math language is the same as saying Math. you learn that in grade two :p |
Leha208: we are not here to do your homework for you. Why don't you post to me privately, and show me how you tried to do this. Then, maybe I can give you some pointers.
Otherwise, there are plenty of matlab tutorials online. |
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