Re: something wrong with my code??

*To*: mathgroup at smc.vnet.net*Subject*: [mg129585] Re: something wrong with my code??*From*: Alexei Boulbitch <Alexei.Boulbitch at iee.lu>*Date*: Sat, 26 Jan 2013 01:40:56 -0500 (EST)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*Delivered-to*: l-mathgroup@wolfram.com*Delivered-to*: mathgroup-newout@smc.vnet.net*Delivered-to*: mathgroup-newsend@smc.vnet.net

First of all, this might give seasoned Mathematica users some serious eye sores cause I'm a newb at this xD f[x_] := (1^-9) (Exp[38.629 x] - 1); data = Table[if[[f[x], {x, -5, 5, 0.01}] > 0.005, 0.005, f[x]]]; ListPlot [data, DataRange -> {-5, 5}, Joined -> True, PlotRange -> {0, 0.01}, PlotStyle -> {Thickness[0.005]}] What I want to do this is do a plot of a sweep from -5 to 5 with 0.01 stepsize, and if the output value exceeds 0.005, the output value will just be 0.005. It will kind of look like a heavyside step function/unit step function. Any help would be greatly appreciated xD. Hi, Try this, it is probably what you had in mind: f[x_] := 10^-9*(Exp[38.629 x] - 1); data = Table[ If[f[x] > 0.005, {x, 0.005}, {x, f[x]}], {x, -5, 5, 0.01}]; ListPlot[data, PlotRange -> {0, 0.01}, PlotStyle -> {Red, PointSize[0.005]}] However, the problem is more simple that that. Try this: f2[x_] := If[10^-9*(Exp[38.629 x] - 1) > 0.005, 0.005, 10^-9*(Exp[38.629 x] - 1)]; Plot[f2[x], {x, -5, 5}] Your code contains syntax errors. I advise you to have a look into the Math= ematica basics, it pays off. Have fun, Alexei Alexei BOULBITCH, Dr., habil. IEE S.A. ZAE Weiergewan, 11, rue Edmond Reuter, L-5326 Contern, LUXEMBOURG Office phone : +352-2454-2566 Office fax: +352-2454-3566 mobile phone: +49 151 52 40 66 44 e-mail: alexei.boulbitch at iee.lu