I’m trying to translate the following code in Matlab:

```
e = 1.05; %Eccentricity
a = -147562.72; %km
b = abs(a)*sqrt(e.^2 -1); %Equation for Semi-Minor Axis, b
x1 = linspace( a, 2*a, 1E3); %From 0 to a, Upper
ytop = b*sqrt(x1.^2/a^2-1); %Upper Hyperbola Part
ybot = -b*sqrt(x1.^2/a^2-1); %Lower Hyperbola Part
```

to Julia.

Everything seems to go well until `ytop`

. Here’s my code up to that point:

```
ecc=1.05; a=-14; b=abs(a)*sqrt(ecc.^2 -1)
x1=LinRange(a, 2*a, 100)
100-element LinRange{Float64, Int64}:
-14.0,-14.1414,-14.2828,-14.4242,-14.5657,…,-27.5758,-27.7172,-27.8586,-28.0
```

but then:

```
ytop=b*sqrt(x1.^2 / a^2 - 1)
ERROR: MethodError: no method matching -(::Vector{Float64}, ::Int64)
For element-wise subtraction, use broadcasting with dot syntax: array .- scalar
Closest candidates are:
-(::T, ::T) where T<:Union{Int128, Int16, Int32, Int64, Int8, UInt128, UInt16, UInt32, UInt64, UInt8} at ~/julia-1.7.1/share/julia base/int.jl:86
-(::Rational, ::Integer) at ~/julia-1.7.1/share/julia/base/rational.jl:311
-(::T, ::Integer) where T<:AbstractChar at ~/julia-1.7.1/share/julia/base/char.jl:227
...
Stacktrace:
[1] top-level scope
@ REPL[41]:1
```

I went through Julia and Matlab docs trying to understand the Error message (making several changes to the code, trying to match the types, for example), but I couldn’t do it.

Please forgive me my probable ignorance (both of Julia and Matlab), and be willing to help me please.