How to modify a sine wave

I have been trying to shape the amplitude of a sine wave so I have the maximum point a bit flatened during both cycles but I am unsuccessful in matlab. I will appreciate some support

[Walter Roberson]

It looks to me as if instead of it being a sine with a pinched top, as if instead it is is just-a-bit-more than 1/4 of a period of a sine, followed by just-a-bit-more than the next 1/4. Sort of like as if you had plotted 0 to 105 degrees, then 85 to 185 degrees, then 175 to 275 degrees, and so on. A little bit of drawing the same signal range twice.

Answer 1

[Cris LaPierre]

Pick a threshold, and then set anywhere the absolute values of your signal are greater than the threshold equal to the threshold.

Answer 2

[Image Analyst]

Hint:

signal = min(signal, 0.7);