# ERROR: LoadError: MethodError: no method matching +(::Array{Float64,1}, ::Int64) For element-wise addition, use broadcasting with dot syntax: array .+ scalar
**URL:** https://discourse.julialang.org/t/error-loaderror-methoderror-no-method-matching-array-float64-1-int64-for-element-wise-addition-use-broadcasting-with-dot-syntax-array-scalar/67075
**Category:** New to Julia
**Tags:** question
**Created:** [August 26, 2021, 11:46pm UTC](https://discourse.julialang.org/t/error-loaderror-methoderror-no-method-matching-array-float64-1-int64-for-element-wise-addition-use-broadcasting-with-dot-syntax-array-scalar/67075 "2021-08-26T23:46:59Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@setegn\_alemu](https://discourse.julialang.org/u/setegn_alemu)
#### Post date: [August 26, 2021, 11:46pm UTC](https://discourse.julialang.org/t/error-loaderror-methoderror-no-method-matching-array-float64-1-int64-for-element-wise-addition-use-broadcasting-with-dot-syntax-array-scalar/67075/1 "2021-08-26T23:46:59Z")
Write the function `periodic` which takes as its input the vector `t` , vector `c` which contains the vector of coefficents ccc in the order as above, the integers `d_poly` and `d_periodic` corresponding to the order of the polynomial and periodic expansions, and the period `T` , and returns the following:
I simply want to create a period function ( polynomial plus cosine and sine function ).
function poly\_periodic(
t::AbstractVector,
c::AbstractVector,
d\_poly::Integer,
d\_periodic::Integer,
T::Number
)
```
m = length(t)
y = zeros(m)
# Step 1: Extact polynomial and periodic coefficients
c_poly = c[1:d_poly]
c_periodic = c[length(c_poly+1):end]
@assert length(c_periodic) == 2 * d_periodic "Number of periodic coeffs does not match 2 * d_periodic"
# Step 2: Compute the polynomial part
for i in 0:d_poly
y .+= c_poly[i+1]*t.^i
end
# Step 3: Compute the periodic part
for i in 1:d_periodic
y .+= c_periodic[2*i-1]*cos.(2*i*pi*t/T) # cosine term
y .+= c_periodic[2*i]*sin.(2*i*pi*t/T ) # sine term
end
return y
```
end
The error message is belowERROR: LoadError: MethodError: no method matching +(::Array{Float64,1}, ::Int64)
For element-wise addition, use broadcasting with dot syntax: array .+ scalar
Closest candidates are:
+(::Any, ::Any, !Matched::Any, !Matched::Any…) at operators.jl:538
+(!Matched::Complex{Bool}, ::Real) at complex.jl:301
+(!Matched::BigFloat, ::Union{Int16, Int32, Int64, Int8}) at mpfr.jl:378
…
---
### Author:  [@jling](https://discourse.julialang.org/u/jling)
#### Post date: [August 27, 2021, 12:14am UTC](https://discourse.julialang.org/t/error-loaderror-methoderror-no-method-matching-array-float64-1-int64-for-element-wise-addition-use-broadcasting-with-dot-syntax-array-scalar/67075/2 "2021-08-27T00:14:03Z")
what’s not clear about the error message?
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### Author:  [@setegn\_alemu](https://discourse.julialang.org/u/setegn_alemu)
#### Post date: [August 27, 2021, 12:20am UTC](https://discourse.julialang.org/t/error-loaderror-methoderror-no-method-matching-array-float64-1-int64-for-element-wise-addition-use-broadcasting-with-dot-syntax-array-scalar/67075/3 "2021-08-27T00:20:09Z")
Thanks Jling, I am new to Julia. I got difficulty in which part of my code I need to edit.
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### Author:  [@stevengj](https://discourse.julialang.org/u/stevengj)
#### Post date: [August 27, 2021, 12:34am UTC](https://discourse.julialang.org/t/error-loaderror-methoderror-no-method-matching-array-float64-1-int64-for-element-wise-addition-use-broadcasting-with-dot-syntax-array-scalar/67075/4 "2021-08-27T00:34:52Z")
> [@setegn\_alemu](#):
>
> ```julia
> c_periodic = c[length(c_poly+1):end]
>
> ```
This is the error. I think you want `length(c_poly)+1` here?
(You also won’t get ideal performance from this style of code, but that’s a separate issue.)
---
### Author:  [@setegn\_alemu](https://discourse.julialang.org/u/setegn_alemu)
#### Post date: [August 27, 2021, 12:39am UTC](https://discourse.julialang.org/t/error-loaderror-methoderror-no-method-matching-array-float64-1-int64-for-element-wise-addition-use-broadcasting-with-dot-syntax-array-scalar/67075/5 "2021-08-27T00:39:41Z")
Many thanks, for your good spot. It worked.